Gyrase and topoisomerase IV inhibitors

ABSTRACT

The present invention relates to a compound of formula (I) 
                         
or a pharmaceutically acceptable salt thereof wherein X and R are as defined herein. The compounds of formula (I) are useful as gyrase and/or topoisomerase IV inhibitors for treating bacterial infections. The compounds of formula (I) either possess a broad range of anti-bacterial activity and advantageous toxicological properties or are prodrugs of compounds having said activity.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No. 13/349,789, filed on filed on Jan. 13, 2012, U.S. Pat. No. 8,481,551, which claims the benefit under 35 U.S.C. §119 of U.S. Provisional Patent Application Ser. No. 61/432,965 filed Jan. 14, 2011; of U.S. Provisional Patent Application Ser. No. 61/515,174 filed Aug. 4, 2011; of U.S. Provisional Patent Application Ser. No. 61/515,249 filed Aug. 4, 2011; and of U.S. Provisional Patent application Ser. No. 61/449,134 filed Jun. 20, 2011; the contents of each application hereby incorporated by reference.

BACKGROUND OF THE INVENTION

Bacterial resistance to antibiotics has long been recognized, and it is today considered to be a serious worldwide health problem. As a result of resistance, some bacterial infections are either difficult to treat with antibiotics or even untreatable. This problem has become especially serious with the recent development of multiple drug resistance in certain strains of bacteria, such as Streptococcus pneumoniae (SP), Mycobacterium tuberculosis, and Enterococcus. The appearance of Vancomycin resistant enterococcus was particularly alarming because vancomycin was formerly the only effective antibiotic for treating this infection, and had been considered for many infections to be the drug of “last resort”. While many other drug-resistant bacteria do not cause life-threatening disease, such as enterococci, there is the fear that the genes which induce resistance might spread to more deadly organisms such as Staphylococcus aureus, where methicillin resistance is already prevalent (De Clerq, et al., Current Opinion in Anti-infective Investigational Drugs, 1999, 1, 1; Levy, “The Challenge of Antibiotic Resistance”, Scientific American, March, 1998).

Another concern is how quickly antibiotic resistance can spread. For example, until the 1960's SP was universally sensitive to penicillin, and in 1987 only 0.02% of the SP strains in the U.S. were resistant. However, by 1995 it was reported that SP resistance to penicillin was about seven percent and as high as 30% in some parts of the U.S. (Lewis, FDA Consumer magazine (September, 1995); Gershman in The Medical Reporter, 1997).

Hospitals, in particular, serve as centers for the formation and transmission of drug-resistant organisms. Infections occurring in hospitals, known as nosocomial infections, are becoming an increasingly serious problem. Of the two million Americans infected in hospitals each year, more than half of these infections resist at least one antibiotic. The Center for Disease Control reported that in 1992, over 13,000 hospital patients died of bacterial infections that were resistant to antibiotic treatment (Lewis, “The Rise of Antibiotic-Resistant Infections”, FDA Consumer magazine, September 1995).

As a result of the need to combat drug-resistant bacteria and the increasing failure of the available drugs, there has been a resurgent interest in discovering new antibiotics. One attractive strategy for developing new antibiotics is to inhibit DNA gyrase and/or topoisomerase IV, bacterial enzymes necessary for DNA replication, and therefore, necessary for bacterial cell growth and division. Gyrase and/or topoisomerase IV activity are also associated with events in DNA transcription, repair and recombination.

Gyrase is one of the topoisomerases, a group of enzymes which catalyze the interconversion of topological isomers of DNA (see generally, Kornberg and Baker, DNA Replication, 2d Ed., Chapter 12, 1992, W.H. Freeman and Co.; Drlica, Molecular Microbiology, 1992, 6, 425; Drlica and Zhao, Microbiology and Molecular Biology Reviews, 1997, 61, pp. 377-392). Gyrase itself controls DNA supercoiling and relieves topological stress that occurs when the DNA strands of a parental duplex are untwisted during the replication process. Gyrase also catalyzes the conversion of relaxed, closed circular duplex DNA to a negatively superhelical form which is more favorable for recombination. The mechanism of the supercoiling reaction involves the wrapping of gyrase around a region of the DNA, double strand breaking in that region, passing a second region of the DNA through the break, and rejoining the broken strands. Such a cleavage mechanism is characteristic of a type II topoisomerase. The supercoiling reaction is driven by the binding of ATP to gyrase. The ATP is then hydrolyzed during the reaction. This ATP binding and subsequent hydrolysis cause conformational changes in the DNA-bound gyrase that are necessary for its activity. It has also been found that the level of DNA supercoiling (or relaxation) is dependent on the ATP/ADP ratio. In the absence of ATP, gyrase is only capable of relaxing supercoiled DNA.

Bacterial DNA gyrase is a 400 kilodalton protein tetramer consisting of two A (GyrA) and two B subunits (GyrB). Binding and cleavage of the DNA is associated with GyrA, whereas ATP is bound and hydrolyzed by the GyrB protein. GyrB consists of an amino-terminal domain which has the ATPase activity, and a carboxy-terminal domain which interacts with GyrA and DNA. By contrast, eukaryotic type II topoisomerases are homodimers that can relax negative and positive supercoils, but cannot introduce negative supercoils. Ideally, an antibiotic based on the inhibition of bacterial DNA gyrase and/or topoisomerase IV would be selective for these enzymes and be relatively inactive against the eukaryotic type II topoisomerases.

Topoisomerase IV primarily resolves linked chromosome dimers at the conclusion of DNA replication.

The widely-used quinolone antibiotics inhibit bacterial DNA gyrase (GyrA) and/or Topoisomerase IV (ParC). Examples of the quinolones include the early compounds such as nalidixic acid and oxolinic acid, as well as the later, more potent fluoroquinolones such as norfloxacin, ciprofloxacin, and trovafloxacin. These compounds bind to GyrA and/or ParC and stabilize the cleaved complex, thus inhibiting overall gyrase function, leading to cell death. The fluoroquinolones inhibit the catalytic subunits of gyrase (GyrA) and/or Topoisomerase IV (Par C) (see Drlica and Zhao, Microbiology and Molecular Biology Reviews, 1997, 61, 377-392). However, drug resistance has also been recognized as a problem for this class of compounds (WHO Report, “Use of Quinolones in Food Animals and Potential Impact on Human Health”, 1998). With the quinolones, as with other classes of antibiotics, bacteria exposed to earlier compounds often quickly develop cross-resistance to more potent compounds in the same class.

The associated subunits responsible for supplying the energy necessary for catalytic turnover/resetting of the enzymes via ATP hydrolysis are GyrB (gyrase) and ParE (topoisomerase IV), respectively (see, Champoux, J. J., Annu. Rev. Biochem., 2001, 70, pp. 369-413). Compounds that target these same ATP binding sites in the GyrB and ParE subunits would be useful for treating various bacterial infections (see, Charifson et al., J. Med. Chem., 2008, 51, pp. 5243-5263).

There are fewer known inhibitors that bind to GyrB. Examples include the coumarins, novobiocin and coumermycin A1, cyclothialidine, cinodine, and clerocidin. The coumarins have been shown to bind to GyrB very tightly. For example, novobiocin makes a network of hydrogen bonds with the protein and several hydrophobic contacts. While novobiocin and ATP do appear to bind within the ATP binding site, there is minimal overlap in the bound orientation of the two compounds. The overlapping portions are the sugar unit of novobiocin and the ATP adenine (Maxwell, Trends in Microbiology, 1997, 5, 102).

For coumarin-resistant bacteria, the most prevalent point mutation is at a surface arginine residue that binds to the carbonyl of the coumarin ring (Arg136 in E. coli GyrB). While enzymes with this mutation show lower supercoiling and ATPase activity, they are also less sensitive to inhibition by coumarin drugs (Maxwell, Mol. Microbiol., 1993, 9, 681).

Despite being potent inhibitors of gyrase supercoiling, the coumarins have not been widely used as antibiotics. They are generally not suitable due to their low permeability in bacteria, eukaryotic toxicity, and poor water solubility (Maxwell, Trends in Microbiology, 1997, 5, 102). It would be desirable to have a new, effective GyrB and ParE inhibitor that overcomes these drawbacks and, preferably does not rely on binding to Arg136 for activity. Such an inhibitor would be an attractive antibiotic candidate, without a history of resistance problems that plague other classes of antibiotics.

As bacterial resistance to antibiotics has become an important public health problem, there is a continuing need to develop newer and more potent antibiotics. More particularly, there is a need for antibiotics that represent a new class of compounds not previously used to treat bacterial infection. Compounds that target the ATP binding sites in both the GyrB (gyrase) and ParE (topoisomerase IV) subunits would be useful for treating various bacterial infections. Such compounds would be particularly useful in treating nosocomial infections in hospitals where the formation and transmission of resistant bacteria are becoming increasingly prevalent. Furthermore, there is a need for new antibiotics having a broad spectrum of activity with advantageous toxicological properties.

SUMMARY OF THE INVENTION

The present invention is directed to compounds and pharmaceutically acceptable salts thereof, useful as gyrase and/or topoisomerase IV inhibitors. The gyrase and/or topoisomerase IV inhibitors of the present invention may be represented by formula (I) or salts thereof:

wherein R is hydrogen or fluorine; X is hydrogen, —PO(OH)₂, —PO(OH)O⁻M⁺, —PO(O⁻)₂.2M⁺, or —PO(O⁻)₂.D²⁺; M⁺ is a pharmaceutically acceptable monovalent cation; and D²⁺ is a pharmaceutically acceptable divalent cation. The compounds of formula (I) either possess a broad range of anti-bacterial activity and advantageous toxicological properties or are prodrugs of compounds having said activity.

The present invention also relates to compounds of formula (IA), or pharmaceutically acceptable salts thereof, useful as gyrase and/or topoisomerase IV inhibitors. The compounds of formula (IA) are encompassed by formula (I). The compounds of formula (IA) may be represented as:

wherein R is hydrogen or fluorine. The compounds of formula (IA) possess a broad range of anti-bacterial activity and advantageous toxicological properties.

The present invention also relates to compounds of formula (IB), or pharmaceutically acceptable salts thereof, useful as prodrugs for gyrase and/or topoisomerase IV inhibitors. The compounds of formula (IB) are encompassed by formula (I). The compounds of formula (IB) may be represented as:

wherein X is —PO(OH)₂, —PO(OH)O⁻M⁺, —PO(O⁻)₂.2M⁺, or —PO(O⁻)₂.D²⁺; M⁺ is a pharmaceutically acceptable monovalent cation; and D²⁺ is a pharmaceutically acceptable divalent cation. The compounds of formula (IB) are phosphate ester prodrugs of the compound (R)-1-ethyl-3-(6-fluoro-5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea, which possesses a broad range of anti-bacterial activity and advantageous toxicological properties. In addition to the compounds provided herein, the present invention further provides a pharmaceutical composition comprising a compound of formula (I) (which includes other formulae encompassed by formula (I) such as formulae (IA), (IB), (IC) and (ID)) or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier.

In another embodiment, the present invention relates to a pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof, a pharmaceutically acceptable carrier, and an additional therapeutic agent selected from an antibiotic, an anti-inflammatory agent, a matrix metalloproteinase inhibitor, a lipoxygenase inhibitor, a cytokine antagonist, an immunosuppressant, an anti-cancer agent, an anti-viral agent, a cytokine, a growth factor, an immunomodulator, a prostaglandin or an anti-vascular hyperproliferation compound.

In another embodiment, the present invention relates to a method of treating a bacterial infection in a mammal in need thereof, comprising administering to said mammal a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof.

In a further embodiment, the present invention relates to a method of treating a bacterial infection in a mammal in need thereof, comprising administering to said mammal a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof and an antibiotic, an anti-inflammatory agent, a matrix metalloproteinase inhibitor, a lipoxygenase inhibitor, a cytokine antagonist, an immunosuppressant, an anti-cancer agent, an anti-viral agent, a cytokine, a growth factor, an immunomodulator, a prostaglandin or an anti-vascular hyperproliferation compound, either as part of a multiple dosage form together with said compound or as a separate dosage form.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a thermal ellipsoid plot of two symmetry independent molecules of compound 12.

FIG. 2 is a thermal ellipsoid plot of two symmetry independent molecules of compound 23.

DETAILED DESCRIPTION

As used herein, the term “halogen” means F, Cl, Br, or I.

Unless otherwise stated, structures depicted herein are also meant to include all stereochemical forms of the structure; i.e., the R and S configurations for each asymmetric center. Therefore, single stereochemical isomers as well as enantiomeric and diastereomeric mixtures of the present compounds are within the scope of the invention.

Isotopically-labeled forms of compounds of formula (I) wherein one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number usually found in nature are also included herein. Examples of isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, and fluorine, such as ²H, ³H, ¹³C, ¹⁴C, ¹⁵N, ¹⁸O, and ¹⁷O. Such radio-labeled and stable-isotopically labeled compounds are useful, for example, as research or diagnostic tools or gyrase and/or topoisomerase IV inhibitors with improved therapeutic profile. The structures also encompass zwitterionic forms of the compounds or salts, where appropriate.

In one embodiment, compounds of formula (I) include compounds of formula (IC)

wherein R is as defined above. In another embodiment, compounds of formula (I) include compounds of formulae (ID) and (IE) as set forth below:

(R)-1-ethyl-3-(5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea, or a pharmaceutically acceptable salt thereof; and

(R)-1-ethyl-3-(6-fluoro-5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea, or a pharmaceutically acceptable salt thereof. Unless otherwise stated, the phrase “compounds of formula (I)” is intended to include other formulae set forth herein that are encompassed by formula (I) including formulae (IA), (IB), (IC), (ID), and (IE).

The compounds of formula (IB) are prodrugs of their parent compound, 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea. Thus, the activity exhibited upon administration of the prodrug is principally due to the presence of the parent compound that results from cleavage of the prodrug.

The term “prodrug” refers to compounds which are drug precursors which, following administration and absorption, release the drug in vivo via some metabolic process. In general, a prodrug possesses less biological activity than its parent drug. A prodrug may also improve the physical properties of the parent drug and/or it may also improve overall drug efficacy, for example through the reduction of toxicity and unwanted effects of a drug by controlling its absorption, blood levels, metabolic distribution and cellular uptake.

The term “parent compound” or “parent drug” refers to the biologically active entity that is released via enzymatic action of a metabolic or a catabolic process, or via a chemical process following administration of the prodrug. The parent compound may also be the starting material for the preparation of its corresponding prodrug.

The monovalent cations defined by M⁺ include ammonium, alkali metal ions such as sodium, lithium and potassium ions, dicyclohexylamine ion, and N-methyl-D-glucamine ion. The divalent cations defined by D²⁺ include, alkaline earth metal ions such as aluminum, calcium and magnesium ions. Also included are amino acid cations such as ions of arginine, lysine, ornithine, and so forth. If M⁺ is a monovalent cation, it is recognized that if the definition 2M⁺ is present, each of M⁺ may be the same or different. In addition, it is similarly recognized that if the definition 2M⁺ is present, a divalent cation D²⁺ may instead be present. Also, the basic nitrogen-containing groups may be quaternized with such agents as: lower alkyl halides, such as methyl, ethyl, propyl, and butyl chloride, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, dibutyl; diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides; aralkyl halides like benzyl bromide and others.

Various embodiments of the invention, include compounds or salts of formula (IB) as set forth below:

-   -   (1) compounds wherein X is         -   (a) —PO(OH)O⁻M⁺;         -   (b) —PO(O⁻)₂.2M⁺; or         -   (c) —PO(O⁻)₂.D²⁺;     -   (2) compounds wherein M⁺ is         -   (a) Li⁺, Na⁺, K⁺, N-methyl-D-glucamine, or N(R⁹)₄ ⁺; or         -   (b) Na⁺;     -   (c) each R⁹ is independently hydrogen or a C₁-C₄ alkyl group;     -   (3) compounds wherein D²⁺ is         -   (a) Mg²⁺, Ca²⁺, and Ba²⁺; or         -   (b) Ca²⁺;     -   (4) the compound         (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl         phosphate; and     -   (5) the compound disodium         (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl         phosphate.

It is understood that various alternative embodiments of the compounds or salts of formula (OB) can be selected by requiring one or more of the alternate embodiments listed in (1) through (3) above. For example, further embodiments of the invention can be obtained by combining (1)(a) and (2)(a); (1)(a) and (2)(b); (1)(c) and (3)(a); (1)(c) and (3)(b); (1)(b) and (2)(a); (1)(b) and (2)(b); and the like.

The prodrugs of the present invention are characterized by unexpectedly high aqueous solubility. This solubility facilitates administration of higher doses of the prodrug, resulting in a greater drug load per unit dosage.

One embodiment of this invention relates to a method of treating a bacterial infection in a mammal in need thereof, comprising administering to said mammal a therapeutically effective amount of a compound having the formula (I) or a pharmaceutically acceptable salt thereof.

According to another embodiment, the invention provides a method of decreasing or inhibiting bacterial quantity in a biological sample. This method comprises contacting said biological sample with a compound of formula (I) or a pharmaceutically acceptable salt thereof.

The term “biological sample”, as used herein, includes cell cultures or extracts thereof; biopsied material obtained from a mammal or extracts thereof; and blood, saliva, urine, feces, semen, tears, or other body fluids or extracts thereof. The term “biological sample” also includes living organisms, in which case “contacting a compound of this invention with a biological sample” is synonymous with the term “administering said compound or composition comprising said compound) to a mammal”.

One embodiment comprises contacting said biological sample with a compound selected from the group consisting of (R)-1-ethyl-3-(5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea, or a pharmaceutically acceptable salt thereof; and (R)-1-ethyl-3-(6-fluoro-5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea, or a pharmaceutically acceptable salt thereof. Pharmaceutical compositions useful for such methods are described below.

One embodiment comprises contacting said biological sample with a phosphate ester prodrug of (R)-1-ethyl-3-(6-fluoro-5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea, as defined by formula (IB). Pharmaceutical compositions useful for such methods are described below.

The antimicrobial activity of the compounds of formula (I) may be demonstrated in an antimicrobial susceptibility assay. The details of the conditions used for the antimicrobial susceptibility assays are set forth in the Examples below.

The gyrase and/or topoisomerase IV inhibitors of this invention, or pharmaceutical salts thereof, may be formulated into pharmaceutical compositions for administration to animals or humans. These pharmaceutical compositions effective to treat or prevent a bacterial infection which comprise the gyrase and/or topoisomerase IV inhibitor in an amount sufficient to measurably decrease bacterial quantity and a pharmaceutically acceptable carrier, are another embodiment of the present invention. The term “measurably decrease bacterial quantity”, as used herein means a measurable change in the number of bacteria between a sample containing said inhibitor and a sample containing only bacteria.

Agents which increase the susceptibility of bacterial organisms to antibiotics are known. For example, U.S. Pat. Nos. 5,523,288, 5,783,561 and 6,140,306 describe methods of using bactericidal/permeability-increasing protein (BPI) for increasing antibiotic susceptibility of gram-positive and gram-negative bacteria. Agents that increase the permeability of the outer membrane of bacterial organisms have been described by Vaara, M. in Microbiological Reviews (1992) pp. 395-411, and the sensitization of gram-negative bacteria has been described by Tsubery, H., et al, in J. Med. Chem. (2000) pp. 3085-3092.

Another embodiment of this invention relates to a method, as described above, of preventing, controlling, treating or reducing the advancement, severity or effects of a bacterial infection in a mammal in need thereof, but further comprising the step of administering to said mammal an agent which increases the susceptibility of bacterial organisms to antibiotics.

According to another embodiment, the methods of the present invention are useful to treat patients in the veterinarian field including, but not limited to, zoo, laboratory, human companion, and farm animals including primates, rodents, reptiles and birds. Examples of said animals include, but are not limited to, guinea pigs, hamsters, gerbils, rat, mice, rabbits, dogs, cats, horses, pigs, sheep, cows, goats, deer, rhesus monkeys, monkeys, tamarinds, apes, baboons, gorillas, chimpanzees, orangutans, gibbons, ostriches, chickens, turkeys, ducks, and geese.

The pharmaceutical compositions and methods of this invention will be useful generally for controlling bacterial infections in vivo. Examples of bacterial organisms that may be controlled by the compositions and methods of this invention include, but are not limited to the following organisms: Streptococcus pneumoniae, Streptococcus pyogenes, Enterococcus faecalis, Enterococcus faecium, Klebsiella pneumoniae, Enterobacter spp. Proteus spp. Pseudomonas aeruginosa, E. coli, Serratia marcescens, Staphylococcus aureus, Coag. Neg. Staphylococci, Haemophilus influenzae, Bacillus anthraces, Mycoplasma pneumoniae, Moraxella catarrhalis, Chlamydophila pneumoniae, Chlamydia trachomatis, Legionella pneumophila, Mycobacterium tuberculosis, Helicobacter pylori, Staphylococcus saprophyticus, Staphylococcus epidermidis, Francisella tularensis, Yersinia pestis, Clostridium difficile, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacteriumabscessus, Mycobacterium kansasii and Mycobacterium ulcerans.

The compositions and methods will therefore be useful for controlling, treating or reducing the advancement, severity or effects of nosocomial or non-nosocomial infections. Examples of nosocomial and non-nosocomial infections include but are not limited to upper respiratory infections, lower respiratory infections, ear infections, pleuropulmonary and bronchial infections, complicated urinary tract infections, uncomplicated urinary tract infections, intra-abdominal infections, cardiovascular infections, a blood stream infection, sepsis, bacteremia, CNS infections, skin and soft tissue infections, GI infections, bone and joint infections, genital infections, eye infections, or granulomatous infections. Examples of specific bacterial infections include but are not limited to uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), catheter infections, pharyngitis, sinusitis, otitis externa, otitis media, bronchitis, empyema, pneumonia, community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), diabetic foot infections, vancomycin resistant enterococci infections, cystitis and pyelonephritis, renal calculi, prostatitis, peritonitis, complicated intra-abdominal infections (cIAI) and other inter-abdominal infections, dialysis-associated peritonitis, visceral abscesses, endocarditis, myocarditis, pericarditis, transfusion-associated sepsis, meningitis, encephalitis, brain abscess, osteomyelitis, arthritis, genital ulcers, urethritis, vaginitis, cervicitis, gingivitis, conjunctivitis, keratitis, endophthalmitisa, an infection in cystic fibrosis patients or an infection of febrile neutropenic patients.

The term “non-nosocomial infections” is also referred to as community acquired infections.

In one embodiment, the compositions and methods will therefore be useful for controlling, treating or reducing the advancement, severity or effects of community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), bacteremia, diabetic foot infections, catheter infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), vancomycin resistant enterococci infections or osteomyelitis.

In another embodiment, the compositions and methods will therefore be useful for controlling, treating or reducing the advancement, severity or effects of upper respiratory infections, lower respiratory infections, ear infections, pleuropulmonary and bronchial infections, complicated urinary tract infections, uncomplicated urinary tract infections, intra-abdominal infections, cardiovascular infections, a blood stream infection, sepsis, bacteremia, CNS infections, skin and soft tissue infections, GI infections, bone and joint infections, genital infections, eye infections, or granulomatous infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), catheter infections, pharyngitis, sinusitis, otitis externa, otitis media, bronchitis, empyema, pneumonia, community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), diabetic foot infections, vancomycin resistant enterococci infections, cystitis and pyelonephritis, renal calculi, prostatitis, peritonitis, complicated intra-abdominal infections (cIAI) and other inter-abdominal infections, dialysis-associated peritonitis, visceral abscesses, endocarditis, myocarditis, pericarditis, transfusion-associated sepsis, meningitis, encephalitis, brain abscess, osteomyelitis, arthritis, genital ulcers, urethritis, vaginitis, cervicitis, gingivitis, conjunctivitis, keratitis, endophthalmitisa, an infection in cystic fibrosis patients or an infection of febrile neutropenic patients.

In another embodiment, the bacterial infection is characterized by the presence of one or more of Streptococcus pneumoniae, Streptococcus pyogenes, Enterococcus faecalis, Enterococcus faecium, Staphylococcus aureus, Coag. Neg. Staphlococci, Bacillus anthraces, Staphylococcus epidermidis, Staphylococcus saprophyticus, or Mycobacterium tuberculosis.

In another embodiment, the bacterial infection is characterized by the presence of one or more of Streptococcus pneumoniae, Enterococcus faecalis, or Staphylococcus aureus.

In another embodiment, the bacterial infection is characterized by the presence of one or more of E. coli, Moraxella catarrhalis, or Haemophilus influenzae.

In another embodiment, the bacterial infection is characterized by the presence of one or more of Clostridium difficile, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae and Chlamydia tracomatis.

In another embodiment, the bacterial infection is characterized by the presence of one or more of Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci.

In some embodiments, the bacterial infection is characterized by the presence of one or more of Methicillin resistant Staphylococcus aureus, Fluoroquinolone resistant Staphylococcus aureus, Vancomycin intermediate resistant Staphylococcus aureus, Linezolid resistant Staphylococcus aureus, Penicillin resistant Streptococcus pneumoniae, Macrolide resistant Streptococcus pneumoniae, Fluoroquinolone resistant Streptococcus pneumoniae, Vancomycin resistant Enterococcus faecalis, Linezolid resistant Enterococcus faecalis, Fluoroquinolone resistant Enterococcus faecalis, Vancomycin resistant Enterococcus faecium, Linezolid resistant Enterococcus faecium, Fluoroquinolone resistant Enterococcus faecium, Ampicillin resistant Enterococcus faecium, Macrolide resistant Haemophilus influenzae, β-lactam resistant Haemophilus influenzae, Fluoroquinolone resistant Haemophilus influenzae, β-lactam resistant Moraxella catarrhalis, Methicillin resistant Staphylococcus epidermidis, Methicillin resistant Staphylococcus epidermidis, Vancomycin resistant Staphylococcus epidermidis, Fluoroquinolone resistant Staphylococcus epidermidis, Macrolide resistant Mycoplasma pneumoniae, Isoniazid resistant Mycobacterium tuberculosis, Rifampin resistant Mycobacterium tuberculosis, Methicillin resistant Coagulase negative staphylococcus, Fluoroquinolone resistant Coagulase negative staphylococcus, Glycopeptide intermediate resistant Staphylococcus aureus, Vancomycin resistant Staphylococcus aureus, Hetero vancomycin intermediate resistant Staphylococcus aureus, Hetero vancomycin resistant Staphylococcus aureus, Macrolide-Lincosamide-Streptogramin resistant Staphylococcus, β-lactam resistant Enterococcus faecalis, β-lactam resistant Enterococcus faecium, Ketolide resistant Streptococcus pneumoniae, Ketolide resistant Streptococcus pyogenes, Macrolide resistant Streptococcus pyogenes, Vancomycin resistant staphylococcus epidermidis, Fluoroquinolone resistant Neisseria gonorrhoeae, Multidrug Resistant Pseudomonas aeruginosa or Cephalosporin resistant Neisseria gonorrhoeae.

According to another embodiment, the Methicillin resistant Staphylococci are selected from Methicillin resistant Staphylococcus aureus, Methicillin resistant Staphylococcus epidermidis, or Methicillin resistant Coagulase negative staphylococcus.

In some embodiments, a form of a compound of formula (I) is used to treat community acquired MRSA (i.e., cMRSA).

In other embodiments, a form of a compound of formula (I) is used to treat daptomycin resistant organism including, but not limited to, daptomycin resistant Enterococcus faecium and daptomycin resistant Staphylococcus aureus.

According to another embodiment, the Fluoroquinolone resistant Staphylococci are selected from Fluoroquinolone resistant Staphylococcus aureus, Fluoroquinolone resistant Staphylococcus epidermidis, or Fluoroquinolone resistant Coagulase negative staphylococcus.

According to another embodiment, the Glycopeptide resistant Staphylococci are selected from Glycopeptide intermediate resistant Staphylococcus aureus, Vancomycin resistant Staphylococcus aureus, Vancomycin intermediate resistant Staphylococcus aureus, Hetero vancomycin intermediate resistant Staphylococcus aureus, or Hetero vancomycin resistant Staphylococcus aureus.

According to another embodiment, the Macrolide-Lincosamide-Streptogramin resistant Staphylococci is Macrolide-Lincosamide-Streptogramin resistant Staphylococcus aureus.

According to another embodiment, the Linezolid resistant Enterococciare selected from Linezolid resistant Enterococcus faecalis, or Linezolid resistant Enterococcus faecium.

According to another embodiment, the Glycopeptide resistant Enterococci are selected from Vancomycin resistant Enterococcus faecium or Vancomycin resistant Enterococcus faecalis.

According to another embodiment, the β-lactam resistant Enterococcus faecalis is β-lactam resistant Enterococcus faecium.

According to another embodiment, the Penicillin resistant Streptococci is Penicillin resistant Streptococcus pneumoniae.

According to another embodiment, the Macrolide resistant Streptococci is Macrolide resistant Streptococcus pneumonia.

According to another embodiment, the Ketolide resistant Streptococci are selected from Macrolide resistant Streptococcus pneumoniae and Ketolide resistant Streptococcus pyogenes.

According to another embodiment, the Fluoroquinolone resistant Streptococci is Fluoroquinolone resistant Streptococcus pneumoniae.

According to another embodiment, the β-lactam resistant Haemophilus is β-lactam resistant Haemophilus influenzae.

According to another embodiment, the Fluoroquinolone resistant Haemophilus is Fluoroquinolone resistant Haemophilus influenzae.

According to another embodiment, the Macrolide resistant Haemophilus is Macrolide resistant Haemophilus influenzae.

According to another embodiment, the Macrolide resistant Mycoplasma is Macrolide resistant Mycoplasma pneumoniae.

According to another embodiment, the Isoniazid resistant Mycobacterium is Isoniazid resistant Mycobacterium tuberculosis.

According to another embodiment, the Rifampin resistant Mycobacterium is Rifampin resistant Mycobacterium tuberculosis.

According to another embodiment, the β-lactam resistant Moraxella is β-lactam resistant Moraxella catarrhalis.

According to another embodiment, the bacterial infection is characterized by the presence of one or more of the following: Methicillin resistant Staphylococcus aureus, Fluoroquinolone resistant Staphylococcus aureus, Vancomycin intermediate resistant Staphylococcus aureus, Linezolid resistant Staphylococcus aureus, Penicillin resistant Streptococcus pneumoniae, Macrolide resistant Streptococcus pneumoniae, Fluoroquinolone resistant Streptococcus pneumoniae, Vancomycin resistant Enterococcus faecalis, Linezolid resistant Enterococcus faecalis, Fluoroquinolone resistant Enterococcus faecalis, Vancomycin resistant Enterococcus faecium, Linezolid resistant Enterococcus faecium, Fluoroquinolone resistant Enterococcus faecium, Ampicillin resistant Enterococcus faecium, Macrolide resistant Haemophilus influenzae, β-lactam resistant Haemophilus influenzae, Fluoroquinolone resistant Haemophilus influenzae, β-lactam resistant Moraxella catarrhalis, Methicillin resistant Staphylococcus epidermidis, Methicillin resistant Staphylococcus epidermidis, Vancomycin resistant Staphylococcus epidermidis, Fluoroquinolone resistant Staphylococcus epidermidis, Macrolide resistant Mycoplasma pneumoniae, Isoniazid resistant Mycobacterium tuberculosis, Rifampin resistant Mycobacterium tuberculosis, Fluoroquinolone resistant Neisseria gonorrhoeae or Cephalosporin resistant Neisseria gonorrhoeae.

According to another embodiment, the bacterial infection is characterized by the presence of one or more of the following: Methicillin resistant Staphylococcus aureus, Methicillin resistant Staphylococcus epidermidis, Methicillin resistant Coagulase negative staphylococcus, Fluoroquinolone resistant Staphylococcus aureus, Fluoroquinolone resistant Staphylococcus epidermidis, Fluoroquinolone resistant Coagulase negative staphylococcus, Vancomycin resistant Staphylococcus aureus, Glycopeptide intermediate resistant Staphylococcus aureus, Vancomycin resistant Staphylococcus aureus, Vancomycin intermediate resistant Staphylococcus aureus, Hetero vancomycin intermediate resistant Staphylococcus aureus, Hetero vancomycin resistant Staphylococcus aureus, Vancomycin resistant Enterococcus faecium, Vancomycin resistant Enterococcus faecalis, Penicillin resistant Streptococcus pneumoniae, Macrolide resistant Streptococcus pneumoniae, Fluoroquinolone resistant Streptococcus pneumoniae, Macrolide resistant Streptococcus pyogenes, or β-lactam resistant Haemophilus influenzae.

According to another embodiment, the bacterial infection is characterized by the presence of one or more of the following: Methicillin resistant Staphylococcus aureus, Vancomycin resistant Enterococcus faecium, Vancomycin resistant Enterococcus faecalis, Vancomycin resistant Staphylococcus aureus, Vancomycin intermediate resistant Staphylococcus aureus, Hetero vancomycin intermediate resistant Staphylococcus aureus, Hetero vancomycin resistant Staphylococcus aureus, Multidrug Resistant Pseudomonas aeruginosa, Isoniazid resistant Mycobacterium tuberculosis, and Rifampin resistant Mycobacterium tuberculosis.

In addition to the compounds of this invention, pharmaceutically acceptable derivatives or prodrugs of the compounds of this invention may also be employed in compositions to treat or prevent the above-identified disorders.

A “pharmaceutically acceptable derivative or prodrug” means any pharmaceutically acceptable salt, ester, salt of an ester or other derivative of a compound of this invention which, upon administration to a recipient, is capable of providing, either directly or indirectly, a compound of this invention or an inhibitorily active metabolite or residue thereof. Particularly favored derivatives or prodrugs are those that increase the bioavailability of the compounds of this invention when such compounds are administered to a mammal (e.g., by allowing an orally administered compound to be more readily absorbed into the blood) or which enhance delivery of the parent compound to a biological compartment (e.g., the brain or lymphatic system) relative to the parent species.

Pharmaceutically acceptable prodrugs of the compounds of this invention include, without limitation, esters, amino acid esters, phosphate esters, metal salts and sulfonate esters.

Pharmaceutically acceptable salts of the compounds of this invention include those derived from pharmaceutically acceptable inorganic and organic acids and bases. Examples of suitable acid salts include acetate, adipate, alginate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, citrate, camphorate, camphorsulfonate, cyclopentanepropionate, digluconate, dodecylsulfate, ethanesulfonate, formate, fumarate, glucoheptanoate, glycerophosphate, glycolate, hemisulfate, heptanoate, hexanoate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesulfonate, lactate, maleate, malonate, methanesulfonate, 2-naphthalenesulfonate, nicotinate, nitrate, palmoate, pectinate, persulfate, 3-phenylpropionate, phosphate, picrate, pivalate, propionate, salicylate, succinate, sulfate, tartrate, thiocyanate, tosylate and undecanoate. Other acids, such as oxalic, while not in themselves pharmaceutically acceptable, may be employed in the preparation of salts useful as intermediates in obtaining the compounds of the invention and their pharmaceutically acceptable acid addition salts.

Salts derived from appropriate bases include alkali metal (e.g., sodium and potassium), alkaline earth metal (e.g., magnesium), ammonium and N⁺(C₁₋₄ alkyl)₄ salts. This invention also envisions the quaternization of any basic nitrogen-containing groups of the compounds disclosed herein. Water or oil-soluble or dispersible products may be obtained by such quaternization.

Pharmaceutical compositions of this invention comprise a compound of formula (I) or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier. Such compositions may optionally comprise an additional therapeutic agent. Such agents include, but are not limited to, an antibiotic, an anti-inflammatory agent, a matrix metalloprotease inhibitor, a lipoxygenase inhibitor, a cytokine antagonist, an immunosuppressant, an anti-cancer agent, an anti-viral agent, a cytokine, a growth factor, an immunomodulator, a prostaglandin or an anti-vascular hyperproliferation compound.

The term “pharmaceutically acceptable carrier” refers to a non-toxic carrier that may be administered to a patient, together with a compound of this invention, and which does not destroy the pharmacological activity thereof.

Pharmaceutically acceptable carriers that may be used in the pharmaceutical compositions of this invention include, but are not limited to, ion exchangers, alumina, aluminum stearate, lecithin, serum proteins, such as human serum albumin, buffer substances such as phosphates, glycine, sorbic acid, potassium sorbate, partial glyceride mixtures of saturated vegetable fatty acids, water, salts or electrolytes, such as protamine sulfate, disodium hydrogen phosphate, potassium hydrogen phosphate, sodium chloride, zinc salts, colloidal silica, magnesium trisilicate, polyvinyl pyrrolidone, cellulose-based substances, polyethylene glycol, sodium carboxymethylcellulose, polyacrylates, waxes, polyethylene-polyoxypropylene-block polymers, wool fat and self-emulsifying drug delivery systems (SEDDS) such as alpha-tocopherol, polyethyleneglycol 1000 succinate, or other similar polymeric delivery matrices.

The term “pharmaceutically effective amount” refers to an amount effective in treating or ameliorating a bacterial infection in a patient. The term “prophylactically effective amount” refers to an amount effective in preventing or substantially lessening a bacterial infection in a patient.

Depending upon the particular condition, or disease state, to be treated or prevented, additional therapeutic agents, which are normally administered to treat or prevent that condition, may be administered together with the inhibitors of this invention. Such therapeutic agents include, but are not limited to, an antibiotic, an anti-inflammatory agent, a matrix metalloprotease inhibitor, a lipoxygenase inhibitor, a cytokine antagonist, an immunosuppressant, an anti-cancer agent, an anti-viral agent, a cytokine, a growth factor, an immunomodulator, a prostaglandin or an anti-vascular hyperproliferation compound.

The compounds of this invention may be employed in a conventional manner for controlling bacterial infections levels in vivo and for treating diseases or reducing the advancement or severity of effects which are mediated by bacteria. Such methods of treatment, their dosage levels and requirements may be selected by those of ordinary skill in the art from available methods and techniques.

For example, a compound of this invention may be combined with a pharmaceutically acceptable adjuvant for administration to a patient suffering from a bacterial infection or disease in a pharmaceutically acceptable manner and in an amount effective to lessen the severity of that infection or disease.

Alternatively, the compounds of this invention may be used in compositions and methods for treating or protecting individuals against bacterial infections or diseases over extended periods of time. In one embodiment, the compounds of this invention may be used in compositions and methods for treating or protecting individuals against bacterial infections or diseases over a 1-2 week period. In another embodiment, the compounds of this invention may be used in compositions and methods for treating or protecting individuals against bacterial infections or diseases over a 4-8 week period (for example, in the treatment of patients with or at risk for developing endocarditis or osteomyelitis). In another embodiment, the compounds of this invention may be used in compositions and methods for treating or protecting individuals against bacterial infections or diseases over an 8-12 week period. The compounds may be employed in such compositions either alone or together with other compounds of this invention in a manner consistent with the conventional utilization of enzyme inhibitors in pharmaceutical compositions. For example, a compound of this invention may be combined with pharmaceutically acceptable adjuvants conventionally employed in vaccines and administered in prophylactically effective amounts to protect individuals over an extended period of time against bacterial infections or diseases.

In some embodiments, compounds of formula (I) may be used prophylactically to prevent a bacterial infection. In some embodiments, compounds of formula (I) may be used before, during or after a dental or surgical procedure to prevent opportunistic infections such as those encountered in bacterial endocarditis. In other embodiments, compounds of formula (I) may be used prophylactically in dental procedures, including but not limited to extractions, periodontal procedures, dental implant placements and endodontic surgery. In other embodiments, compounds of formula (I) may be used prophylactically in surgical procedures including but not limited to general surgery, respiratory surgery (tonsillectomy/adenoidectomy), gastrointestinal surgery (upper GI and elective small bowel surgery, esophageal sclerotherapy and dilation, large bowel resections, acute appendectomy), trauma surgery (penetrating abdominal surgery), genito-urinary tract surgery (prostatectomy, urethral dilation, cystoscopy, vaginal or abdominal hysterectomy, cesarean section), transplant surgery (kidney, liver, pancreas or kidney transplantation), head and neck surgery (skin excisions, neck dissections, laryngectomy, head and neck cancer surgeries, mandibular fractures), orthopaedic surgery (total joint replacement, traumatic open fractures), vascular surgery (peripheral vascular procedures), cardiothoracic surgery, coronary bypass surgery, pulmonary resection and neurosurgery.

The term “prevent a bacterial infection” as used herein, unless otherwise indicated, means the prophylactic use of an antibiotic, such as a gyrase and/or topoisomerase IV inhibitor of the present invention, to prevent a bacterial infection. Treatment with a gyrase and/or topoisomerase IV inhibitor could be done prophylactically to prevent an infection caused by an organism that is susceptible to the gyrase and/or topoisomerase IV inhibitor. One general set of conditions where prophylactic treatment could be considered is when an individual is more vulnerable to infection due to, for example, weakened immunity, surgery, trauma, presence of an artificial device in the body (temporary or permanent), an anatomical defect, exposure to high levels of bacteria or possible exposure to a disease-causing pathogen. Examples of factors that could lead to weakened immunity include chemotherapy, radiation therapy, diabetes, advanced age, HIV infection, and transplantation. An example of an anatomical defect would be a defect in the heart valve that increases the risk of bacterial endocarditis. Examples of artificial devices include artificial joints, surgical pins, catheters, etc. Another set of situations where prophylactic use of a gyrase and/or topoisomerase IV inhibitor might be appropriate would be to prevent the spread of a pathogen between individuals (direct or indirect). A specific example of prophylactic use to prevent the spread of a pathogen is the use of a gyrase and/or topoisomerase IV inhibitor by individuals in a healthcare institution (for example a hospital or nursing home).

The compounds of formula (I) may also be co-administered with other antibiotics to increase the effect of therapy or prophylaxis against various bacterial infections. When the compounds of this invention are administered in combination therapies with other agents, they may be administered sequentially or concurrently to the patient. Alternatively, pharmaceutical or prophylactic compositions according to this invention comprise a combination of a compound of formula (I) and another therapeutic or prophylactic agent.

In some embodiments, the additional therapeutic agent or agents is an antibiotic selected from a natural penicillin, a penicillinase-resistant penicillin, an antipseudomonal penicillin, an aminopenicillin, a first generation cephalosporin, a second generation cephalosporin, a third generation cephalosporin, a fourth generation cephalosporin, a carbapenem, a cephamycin, a quinolone, a fluoroquinolone, an aminoglycoside, a macrolide, a ketolide, a polymyxin, a tetracycline, a glycopeptide, a streptogramin, an oxazolidinone, a rifamycin, or a sulfonamide.

In some embodiments, the additional therapeutic agent or agents is an antibiotic selected from a penicillin, a cephalosporin, a quinolone, an aminoglycoside or an oxazolidinone.

In other embodiments, the additional therapeutic agents are selected from a natural penicillin including Benzathine penicillin G, Penicillin G and Penicillin V, from a penicillinase-resistant penicillin including Cloxacillin, Dicloxacillin, Nafcillin and Oxacillin, from a antipseudomonal penicillin including Carbenicillin, Mezlocillin, Pipercillin, Pipercillin/tazobactam, Ticaricillin and Ticaricillin/Clavulanate, from an aminopenicillin including Amoxicillin, Ampicillin and Ampicillin/Sulbactam, from a first generation cephalosporin including Cefazolin, Cefadroxil, Cephalexin and Cephadrine, from a second generation cephalosporin including Cefaclor, Cefaclor-CD, Cefamandole, Cefonacid, Cefprozil, Loracarbef and Cefuroxime, from a third generation cephalosporin including Cefdinir, Cefixime, Cefoperazone, Cefotaxime, Cefpodoxime, Ceftazidime, Ceftibuten, Ceftizoxme and Ceftriaxone, from a fourth generation cephalosporin including Cefepime, Ceftaroline and Ceftobiprole, from a Cephamycin including Cefotetan and Cefoxitin, from a carbapenem including Doripenem, Imipenem and Meropenem, from a monobactam including Aztreonam, from a quinolone including Cinoxacin, Nalidixic acid, Oxolininc acid and Pipemidic acid, from a fluoroquinolone including Besifloxacin, Ciprofloxacin, Enoxacin, Gatifloxacin, Grepafloxacin, Levofloxacin, Lomefloxacin, Moxifloxacin, Norfloxacin, Ofloxacin and Sparfloxacin, from an aminoglycoside including Amikacin, Gentamicin, Kanamycin, Neomycin, Netilmicin, Spectinomycin, Streptomycin and Tobramycin, from a macrolide including Azithromycin, Clarithromycin and Erythromycin, from a ketolide including Telithromycin, from a Tetracycline including Chlortetracycline, Demeclocycline, Doxycycline, Minocycline and Tetracycline, from a glycopeptide including Oritavancin, Dalbavancin, Telavancin, Teicoplanin and Vancomycin, from a streptogramin including Dalfopristin/quinupristin, from an oxazolidone including Linezolid, from a Rifamycin including Rifabutin and Rifampin and from other antibiotics including bactitracin, colistin, Tygacil, Daptomycin, chloramphenicol, clindamycin, isoniazid, metronidazole, mupirocin, polymyxin B, pyrazinamide, trimethoprim/sulfamethoxazole and sulfisoxazole.

In other embodiments, the additional therapeutic agents are selected from a natural penicillin including Penicillin G, from a penicillinase-resistant penicillin including Nafcillin and Oxacillin, from an antipseudomonal penicillin including Pipercillin/tazobactam, from an aminopenicillin including Amoxicillin, from a first generation cephalosporin including Cephalexin, from a second generation cephalosporin including Cefaclor, Cefaclor-CD and Cefuroxime, from a third generation cephalosporin including Ceftazidime and Ceftriaxone, from a fourth generation cephalosporin including Cefepime, from a carbapenem including Imepenem, Meropenem, Ertapenem, Doripenem, Panipenem and Biapenem, a fluoroquinolone including Ciprofloxacin, Gatifloxacin, Levofloxacin and Moxifloxacin, from an aminoglycoside including Tobramycin, from a macrolide including Azithromycin and Clarithromycin, from a Tetracycline including Doxycycline, from a glycopeptide including Vancomycin, from a Rifamycin including Rifampin and from other antibiotics including isoniazid, pyrazinamide, Tygacil, Daptomycin or trimethoprim/sulfamethoxazole.

In some embodiments, a solid form of a compound of formula (I), can be administered for the treatment of a gram positive infection. In some embodiments, the composition is a solid, liquid (e.g., a suspension), or an iv (e.g., a form of the formula (I) compound is dissolved into a liquid and administered iv) composition. In some embodiments, the composition including a formula (I) compound, is administered in combination with an additional antibiotic agent, for example, a natural penicillin, a penicillinase-resistant penicillin, an antipseudomonal penicillin, an aminopenicillin, a first generation cephalosporin, a second generation cephalosporin, a third generation cephalosporin, a fourth generation cephalosporin, a carbapenem, a cephamycin, a quinolone, a fluoroquinolone, an aminoglycoside, a macrolide, a ketolide, a polymyxin, a tetracycline, a glycopeptide, a streptogramin, an oxazolidinone, a rifamycin, or a sulfonamide. In some embodiments, the composition including a solid form of a formula (I) compound is administered orally, and the additional antibiotic agent, for example, a natural penicillin, a penicillinase-resistant penicillin, an antipseudomonal penicillin, an aminopenicillin, a first generation cephalosporin, a second generation cephalosporin, a third generation cephalosporin, a fourth generation cephalosporin, a carbapenem, a cephamycin, a quinolone, a fluoroquinolone, an aminoglycoside, a macrolide, a ketolide, a polymyxin, a tetracycline, a glycopeptide, a streptogramin, an oxazolidinone, a rifamycin, or a sulfonamide is administered iv.

In some embodiments, a solid form of a formula (I) compound, can be administered for the treatment of a gram negative infection. In some embodiments, the composition is a solid, liquid (e.g., a suspension), or an iv (e.g., a form of a formula (I) compound is dissolved into a liquid and administered iv) composition. In some embodiments the composition including a formula (I) compound is administered in combination with an additional antibiotic agent, selected from a: natural penicillin, a penicillinase-resistant penicillin, an antipseudomonal penicillin, an aminopenicillin, a first generation cephalosporin, a second generation cephalosporin, a third generation cephalosporin, a fourth generation cephalosporin, a carbapenem, a cephamycin, a monobactam, a quinolone, a fluoroquinolone, an aminoglycoside, a macrolide, a ketolide, a polymyxin, tetracycline or a sulfonamide. In some embodiments, the composition including a solid form of a formula (I) compound is administered orally, and the additional antibiotic agent, for example, a natural penicillin, a penicillinase-resistant penicillin, an antipseudomonal penicillin, an aminopenicillin, a first generation cephalosporin, a second generation cephalosporin, a third generation cephalosporin, a fourth generation cephalosporin, a carbapenem, a cephamycin, a monobactam, a quinolone, a fluoroquinolone, an aminoglycoside, a macrolide, a ketolide, a polymyxin, tetracycline or a sulfonamide is administered orally. In some embodiments, the additional therapeutic agent is administered iv.

The additional therapeutic agents described above may be administered separately, as part of a multiple dosage regimen, from the inhibitor-containing composition. Alternatively, these agents may be part of a single dosage form, mixed together with the inhibitor in a single composition.

The pharmaceutical compositions of this invention may be administered orally, parenterally, by inhalation spray, topically, rectally, nasally, buccally, vaginally or via an implanted reservoir. The pharmaceutical compositions of this invention may contain any conventional non-toxic pharmaceutically-acceptable carriers, adjuvants or vehicles. In some cases, the pH of the formulation may be adjusted with pharmaceutically acceptable acids, bases or buffers to enhance the stability of the formulated compound or its delivery form. The term parenteral as used herein includes subcutaneous, intracutaneous, intravenous, intramuscular, intra-articular, intrasynovial, intrasternal, intrathecal, intralesional and intracranial injection or infusion techniques.

The pharmaceutical, compositions may be in the form of a sterile injectable preparation, for example, as a sterile injectable aqueous or oleaginous suspension. This suspension may be formulated according to techniques known in the art using suitable dispersing or wetting agents (such as, for example, Tween 80) and suspending agents. The sterile injectable preparation may also be a sterile injectable solution or suspension in a non-toxic parenterally-acceptable diluent or solvent, for example, as a solution in 1,3-butanediol. Among the acceptable vehicles and solvents that may be employed are mannitol, water, Ringer's solution and isotonic sodium chloride solution. In addition, sterile, fixed oils are conventionally employed as a solvent or suspending medium. For this purpose, any bland fixed oil may be employed including synthetic mono- or diglycerides. Fatty acids, such as oleic acid and its glyceride derivatives are useful in the preparation of injectables, as are natural pharmaceutically-acceptable oils, such as olive oil or castor oil, especially in their polyoxyethylated versions. These oil solutions or suspensions may also contain a long-chain alcohol diluent or dispersant, such as those described in Pharmacopeia Helvetica, or a similar alcohol.

The pharmaceutical compositions of this invention may be orally administered in any orally acceptable dosage form including, but not limited to, capsules, tablets, and aqueous suspensions and solutions. In the case of tablets for oral use, carriers which are commonly used include lactose and corn starch. Lubricating agents, such as magnesium stearate, are also typically added. For oral administration in a capsule form, useful diluents include lactose and dried corn starch. When aqueous suspensions and solutions and propylene glycol are administered orally, the active ingredient is combined with emulsifying and suspending agents. If desired, certain sweetening and/or flavoring and/or coloring agents may be added.

The pharmaceutical compositions of this invention may also be administered in the form of suppositories for rectal administration. These compositions can be prepared by mixing a compound of this invention with a suitable non-irritating excipient which is solid at room temperature but liquid at the rectal temperature and therefore will melt in the rectum to release the active components. Such materials include, but are not limited to, cocoa butter, beeswax and polyethylene glycols.

Topical administration of the pharmaceutical compositions of this invention is especially useful when the desired treatment involves areas or organs readily accessible by topical application. For application topically to the skin, the pharmaceutical composition should be formulated with a suitable ointment containing the active components suspended or dissolved in a carrier. Carriers for topical administration of the compounds of this invention include, but are not limited to, mineral oil, liquid petroleum, white petroleum, propylene glycol, polyoxyethylene, polyoxypropylene, emulsifying wax and water. Alternatively, the pharmaceutical composition can be formulated with a suitable lotion or cream containing the active compound suspended or dissolved in a carrier. Suitable carriers include, but are not limited to, mineral oil, sorbitan monostearate, polysorbate 60, cetyl esters wax, cetearyl alcohol, 2-octyldodecanol, benzyl alcohol and water. The pharmaceutical compositions of this invention may also be topically applied to the lower intestinal tract by rectal suppository formulation or in a suitable enema formulation. Topically-administered transdermal patches are also included in this invention.

The pharmaceutical compositions of this invention may be administered by nasal aerosol or inhalation. Such compositions are prepared according to techniques well-known in the art of pharmaceutical formulation and may be prepared as solutions in saline, employing benzyl alcohol or other suitable preservatives, absorption promoters to enhance bioavailability, fluorocarbons, and/or other solubilizing or dispersing agents known in the art.

According to another embodiment, compounds of formula (I) may also be delivered by implantation (e.g., surgically), such as with an implantable or indwelling device. An implantable or indwelling device may be designed to reside either permanently or temporarily in a subject. Examples of implantable and indwelling devices include, but are not limited to, contact lenses, central venous catheters and needleless connectors, endotracheal tubes, intrauterine devices, mechanical heart valves, pacemakers, peritoneal dialysis catheters, prosthetic joints, such as hip and knee replacements, tympanostomy tubes, urinary catheters, voice prostheses, stents, delivery pumps, vascular filters and implantable control release compositions. Biofilms can be detrimental to the health of patients with an implantable or indwelling medical device because they introduce an artificial substratum into the body and can cause persistent infections. Thus, providing compounds of formula (I) in or on the implantable or indwelling device can prevent or reduce the production of a biofilm. In addition, implantable or indwelling devices may be used as a depot or reservoir of compounds of formula (I). Any implantable or indwelling device can be used to deliver compounds of formula (I) provided that a) the device, compounds of formula (I) and any pharmaceutical composition including compounds of formula (I) are biocompatible, and b) that the device can deliver or release an effective amount of compounds of formula (I) to confer a therapeutic effect on the treated patient.

Delivery of therapeutic agents via implantable or indwelling devices is known in the art. See for example, “Recent Developments in Coated Stents” by Hofma et al. published in Current Interventional Cardiology Reports 2001, 3:28-36, the entire contents of which, including references cited therein, incorporated herein by reference. Other descriptions of implantable devices can be found in U.S. Pat. Nos. 6,569,195 and 6,322,847; and U.S. Patent Application Numbers 2004/0044405, 2004/0018228, 2003/0229390, 2003/0225450, 2003/0216699 and 2003/0204168, each of which is incorporated herein by reference in its entirety.

In some embodiments, the implantable device is a stent. In one specific embodiment, a stent can include interlocked meshed cables. Each cable can include metal wires for structural support and polymeric wires for delivering the therapeutic agent. The polymeric wire can be dosed by immersing the polymer in a solution of the therapeutic agent. Alternatively, the therapeutic agent can be embedded in the polymeric wire during the formation of the wire from polymeric precursor solutions.

In other embodiments, implantable or indwelling devices can be coated with polymeric coatings that include the therapeutic agent. The polymeric coating can be designed to control the release rate of the therapeutic agent. Controlled release of therapeutic agents can utilize various technologies. Devices are known that have a monolithic layer or coating incorporating a heterogeneous solution and/or dispersion of an active agent in a polymeric substance, where the diffusion of the agent is rate limiting, as the agent diffuses through the polymer to the polymer-fluid interface and is released into the surrounding fluid. In some devices, a soluble substance is also dissolved or dispersed in the polymeric material, such that additional pores or channels are left after the material dissolves. A matrix device is generally diffusion limited as well, but with the channels or other internal geometry of the device also playing a role in releasing the agent to the fluid. The channels can be pre-existing channels or channels left behind by released agent or other soluble substances.

Erodible or degradable devices typically have the active agent physically immobilized in the polymer. The active agent can be dissolved and/or dispersed throughout the polymeric material. The polymeric material is often hydrolytically degraded over time through hydrolysis of labile bonds, allowing the polymer to erode into the fluid, releasing the active agent into the fluid. Hydrophilic polymers have a generally faster rate of erosion relative to hydrophobic polymers. Hydrophobic polymers are believed to have almost purely surface diffusion of active agent, having erosion from the surface inwards. Hydrophilic polymers are believed to allow water to penetrate the surface of the polymer, allowing hydrolysis of labile bonds beneath the surface, which can lead to homogeneous or bulk erosion of polymer.

The implantable or indwelling device coating can include a blend of polymers each having a different release rate of the therapeutic agent. For instance, the coating can include a polylactic acid/polyethylene oxide (PLA-PEO) copolymer and a polylactic acid/polycaprolactone (PLA-PCL) copolymer. The polylactic acid/polyethylene oxide (PLA-PEO) copolymer can exhibit a higher release rate of therapeutic agent relative to the polylactic acid/polycaprolactone (PLA-PCL) copolymer. The relative amounts and dosage rates of therapeutic agent delivered over time can be controlled by controlling the relative amounts of the faster releasing polymers relative to the slower releasing polymers. For higher initial release rates the proportion of faster releasing polymer can be increased relative to the slower releasing polymer. If most of the dosage is desired to be released over a long time period, most of the polymer can be the slower releasing polymer. The device can be coated by spraying the device with a solution or dispersion of polymer, active agent, and solvent. The solvent can be evaporated, leaving a coating of polymer and active agent. The active agent can be dissolved and/or dispersed in the polymer. In some embodiments, the co-polymers can be extruded over the device.

Dosage levels of between about 0.01 and about 100 mg/kg body weight per day, preferably between 0.5 and about 75 mg/kg body weight per day and most preferably between about 1 and 50 mg/kg body weight per day of the active ingredient compound are useful in a monotherapy for the prevention and treatment of bacterial infections.

Typically, the pharmaceutical compositions of this invention will be administered from about 1 to 5 times per day or alternatively, as a continuous infusion. Alternatively, the compositions of the present invention may be administered in a pulsatile formulation. Such administration can be used as a chronic or acute therapy. The amount of active ingredient that may be combined with the carrier materials to produce a single dosage form will vary depending upon the host treated and the particular mode of administration. A typical preparation will contain from about 5% to about 95% active compound (w/w). Preferably, such preparations contain from about 20% to about 80% active compound.

When the compositions of this invention comprise a combination of a compound of formula (I) and one or more additional therapeutic or prophylactic agents, both the compound and the additional agent should be present at dosage levels of between about 10% to 80% of the dosage normally administered in a monotherapy regime.

Upon improvement of a patient's condition, a maintenance dose of a compound, composition or combination of this invention may be administered, if necessary. Subsequently, the dosage or frequency of administration, or both, may be reduced, as a function of the symptoms, to a level at which the improved condition is retained when the symptoms have been alleviated to the desired level, treatment should cease. Patients may, however, require intermittent treatment on a long-term basis upon any recurrence or disease symptoms.

As the skilled artisan will appreciate, lower or higher doses than those recited above may be required. Specific dosage and treatment regimens for any particular patient will depend upon a variety of factors, including the activity of the specific compound employed, the age, body weight, general health status, sex, diet, time of administration, rate of excretion, drug combination, the severity and course of the disease, and the patient's disposition to the disease and the judgment of the treating physician.

According to another embodiment, the invention provides methods for treating or preventing a bacterial infection, or disease state, comprising the step of administering to a patient any compound, pharmaceutical composition, or combination described herein. The term “patient”, as used herein, means an animal, preferably a mammal, and most preferably a human.

The compounds of this invention are also useful as commercial reagents which effectively bind to the gyrase B and/or topoisomerase IV enzymes. As commercial reagents, the compounds of this invention, and their derivatives, may be used to block gyrase B and/or topoisomerase IV activity in biochemical or cellular assays for bacterial gyrase B and/or topoisomerase IV or their homologs or may be derivatized to bind to a stable resin as a tethered substrate for affinity chromatography applications. These and other uses which characterize commercial gyrase B and/or topoisomerase IV inhibitors will be evident to those of ordinary skill in the art.

The compounds of this invention may be prepared in accordance with general methods known to those skilled in the art for analogous compounds, as taught by U.S. Pat. Nos. RE 40245 E; 7,495,014 B2; 7,569,591 B2; 7,582,641 B2; 7,618,974 B2; and 7,727,992 B2. All six of said patents are incorporated by reference as if fully set forth herein. The details of the conditions used for preparing the compounds of the present invention are further set forth in the Examples.

In order that this invention be more fully understood, the following examples are set forth. These examples are for the purpose of illustration only and are not to be construed as limiting the scope of the invention in any way.

The following definitions describe terms and abbreviations used herein:

-   Ac acetyl -   Bu butyl -   Et ethyl -   Ph phenyl -   Me methyl -   THF tetrahydrofuran -   DCM dichloromethane -   CH₂Cl₂ dichloromethane -   EtOAc ethyl acetate -   CH₃CN acetonitrile -   EtOH ethanol -   Et₂O diethyl ether -   MeOH methanol -   MTBE methyl tert-butyl ether -   DMF N,N-dimethylformamide -   DMA N,N-dimethylacetamide -   DMSO dimethyl sulfoxide -   HOAc acetic acid -   TEA triethylamine -   TFA trifluoroacetic acid -   TFAA trifluoroacetic anhydride -   Et₃N triethylamine -   DIPEA diisopropylethylamine -   DIEA diisopropylethylamine -   K₂CO₃ potassium carbonate -   Na₂CO₃ sodium carbonate -   Na₂S₂O₃ sodium thiosulfate -   Cs₂CO₃ cesium carbonate -   NaHCO₃ sodium bicarbonate -   NaOH sodium hydroxide -   Na₂SO₄ sodium sulfate -   MgSO₄, magnesium sulfate -   K₃PO₄ potassium phosphate -   NH₄Cl ammonium chloride -   LC/MS liquid chromatography/mass spectra -   GCMS gas chromatography mass spectra -   HPLC high performance liquid chromatography -   GC gas chromatography -   LC liquid chromatography -   IC ion chromatography -   IM intramuscular -   CFU/cfu colony forming units -   MIC minimum inhibitory concentration -   Hr or h hours -   atm atmospheres -   rt or RT room temperature -   TLC thin layer chromatography -   HCl hydrochloric acid -   H₂O water -   EtNCO ethyl isocyanate -   Pd/C palladium on carbon -   NaOAc sodium acetate -   H₂SO₄ sulfuric acid -   N₂ nitrogen gas -   H₂ hydrogen gas -   n-BuLi n-butyl lithium -   DI de-ionized -   Pd(OAc)₂ palladium(II)acetate -   PPh₃ triphenylphosphine -   i-PrOH isopropyl alcohol -   NBS N-bromosuccinimide -   Pd[(Ph₃)P]₄ tetrakis(triphenylphosphine)palladium(0) -   PTFE polytetrafluoroethylene -   rpm revolutions per minute -   SM starting material -   Equiv. equivalents -   ¹H-NMR proton nuclear magnetic resonance -   HPMCAS hydroxypropylmethylcellulose acetate -   PVP polyvinylpyrrolidone -   EDTA ethylenediaminetetraacetic acid -   K2EDTA dibasic potassium ethylenediaminetetraacetate -   mCPBA meta-chloroperoxybenzoic acid -   aq aqueous -   Boc₂O di-tert-butyl dicarbonate -   DMAP N,N-dimethylaminopyridine -   mL milliliters -   L liters -   mol moles -   g grams -   LCMS liquid chromatography-mass spectrometry -   MHz megahertz -   CDCl₃ deuterochloroform -   NEt₃ triethylamine -   mmol millimoles -   psi pounds per square inch -   iPrOH isopropylalcohol -   ppm parts per million -   NH₄NO₃ ammonium nitrate -   Hz hertz -   Pd(dppf)Cl_(2 [)1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) -   L liters -   MeOD deutero-methanol -   CD₃OD deutero-methanol -   ee enantiomeric excess -   min minutes -   Bn benzyl -   RBF round-bottom flask -   MeCN acetonitrile -   PES polyethersulfone -   mm millimeters -   μm micrometers -   M molar -   N normal -   Boc tert-butoxycarbonyl -   ESMS electrospray mass spectrometry -   CV column volume -   D₂O deuterium oxide -   NH₃ ammonia -   OBD optimum bed density -   mg milligrams -   CLSI Clinical and Laboratory Standards Institute -   ATCC American Type Culture Collection -   MHII Mueller Hinton II -   μL microliters -   WT wild type -   CGSC Coli Genetic Stock Center -   MS mass spectrometry -   IS internal standard -   APCI atmospheric pressure chemical ionization -   MRM multiple reaction monitoring -   m/z mass-to-charge ratio -   LLOQ lower limit of quantitation -   ng nanograms -   UV ultraviolet -   SD standard deviation -   % CV coefficient of variation -   PO perioral -   MC microcrystalline cellulose -   EDTA ethylenediaminetetraacetic acid or ethylenediaminetetraacetate -   PK pharmacokinetic -   IV intravenous -   D5W 5% dextrose in water solution -   HPMC-AS hydroxypropyl methylcellulose acetyl succinate -   PVP polyvinylprrolidone -   CAPT captisol -   ATP adenosine triphosphate -   ADP adenosine diphosphate -   NADH nicotinamide adenine dinucleotide (reduced form) -   NAD+ nicotinamide adenine dinucleotide (oxidized form) -   TRIS tris(hydroxymethyl)aminomethane -   mM millimolar -   MgCl₂ magnesium chloride -   KCl potassium chloride -   μM micromolar -   DTT dithiothreitol -   nM nanomolar -   K_(i) dissociation constant -   IC₅₀ half maximal inhibitory concentration -   μg micrograms -   BSA bovine serum albumin -   LDH lactate dehydrogenase -   PVDF polyvinylidene fluoride -   AcN acetonitrile -   V_(MAX) the maximum initial velocity or rate of a reaction

Example 1 Preparation of 2-(2-nitrophenyl)-2,5-dihydrofuran and 2-(2-nitrophenyl)-2,3-dihydrofuran (3a&3b)

Mixed 1-bromo-2-nitro-benzene (1) (600 g, 99%, 2.941 mol, Alfa Aesar A11686), 1,3-bis(diphenylphosphino)propane (62.50 g, 97%, 147.0 mmol, Alfa Aesar A12931), 1,4-dioxane (2.970 L, Sigma-Aldrich 360481), potassium carbonate (812.9 g, 5.882 mol, JT-Baker 301201), and 2,3-dihydrofuran (2) (1.041 kg, 99%, 1.124 L, 14.70 mol, Aldrich 200018). A stream of nitrogen was bubbled through the stirring mixture for 4 hrs, followed by addition of palladium (II) acetate (16.51 g, 73.52 mmol, Strem 461780) and continuation of deoxygenation for another 10 minutes. The reaction mixture was stirred at reflux under nitrogen overnight (NMR of a worked-up aliquot showed complete consumption of arylbromide). It was allowed to cool, diluted with hexane (1 L), filtered through a short plug of Florisil® (500 g, −200 mesh), and eluted with EtOAc. The filtrate was concentrated under reduced pressure (2-(2-nitrophenyl)-2,3-dihydrofuran is volatile under high vacuum and may be somewhat unstable at room temperature) giving a mixture of (3a) and (3b) as a dark brown oil (654.0 g). The crude material was stored in the refrigerator and carried forward without further purification.

Example 2 Preparation of 2-tetrahydrofuran-2-yl-aniline (4)

Placed 5% palladium on carbon (16.3 g, 50% wet, 3.83 mmol, Aldrich 330116) in a Parr bottle under nitrogen, followed by MeOH (100 mL, JT-Baker 909333). Added the crude mixture of 2-(2-nitrophenyl)-2,5-dihydrofuran and 2-(2-nitrophenyl)-2,3-dihydrofuran (3a&3b)) (163 g) dissolved in MeOH (389 mL), followed by NEt₃ (237.6 mL, 1.705 mol, Sigma-Aldrich 471283). Placed the vessel on a Parr shaker and saturated with H₂. Added 30 psi H₂ and shook until consumption complete (LCMS and NMR showed complete reaction). The reaction mixture was purged with nitrogen, filtered through Celite™ and rinsed with EtOAc. The filtrate was concentrated on a rotary evaporator giving a brown oil. Repeated the reaction three more times on the same scale and the batches were combined for purification. The crude product was vacuum distilled (ca. 15 ton) collecting the distillate at 108-129° C. to give (4) as a clear faint yellow oil (427.9 g, average yield was 84%; 98% GCMS purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 163.95 (1.46 min). ¹H NMR (300 MHz, CDCl₃): δ 7.15-7.04 (m, 2H), 6.77-6.62 (m, 2H), 4.85-4.77 (m, 1H), 4.18 (s, 2H), 4.12-4.02 (m, 1H), 3.94-3.85 (m, 1H), 2.25-1.95 (m, 4H) ppm.

Example 2a Preparation of (R)-2-(tetrahydrofuran-2-yl)aniline (4a)

Dissolved 33 g of compound (4) into MeOH (265 ml) which resulted in a concentration of approximately 125 mg/ml. The mixture was filtered through a 0.2 micron membrane filter then chromatographed on a ChiralPak® IC column (30 mm×150 mm, column temp 35° C., Chiral Technologies) at 100 bar using a Berger multigram supercritical fluid chromatographic system. Mobile phase was (90:10) CO₂:CH₃OH eluting at 350 ml/min with UV monitoring at 220 nanometers. Obtained 15.64 g of desired product (4a) as a green oil. Analytical SFC ([90:10] CO₂:CH₃OH, at 5 ml/min on a ChiralPak IC column (4.6×100 mm) held at 35° C. and run at 100 bar pressure with UV monitoring at 220 nm) showed 95.5% ee with 95% overall purity.

Example 3 Preparation of 4-bromo-2-tetrahydrofuran-2-yl-aniline (5)

To a stirring solution of 2-tetrahydrofuran-2-yl-aniline (4) (53.45 g, 327.5 mmol) in methyl tert-butyl ether (MTBE, 641.4 mL) and acetonitrile (213.8 mL) cooled to 2° C. was added N-bromosuccinimide (58.88 g, 99%, 327.5 mmol, Aldrich B81255) in 4 portions maintaining internal temperature below about 8° C. The reaction mixture was stirred while cooling with an ice-water bath for 30 minutes (NMR of a worked-up aliquot showed complete consumption of starting material). Added aqueous 1 N Na₂S₂O₃ (330 mL), removed the cold bath and stirred for 20 minutes. The mixture was diluted with EtOAc and the layers were separated. The organic phase was washed with saturated aqueous NaHCO₃ (2×), water, brine, dried over MgSO₄, filtered through a short plug of silica, eluted with EtOAc, and concentrated under reduced pressure to give (5) as a very dark amber oil (82.25 g, 77-94% HPLC purity). Carried forward without further purification. LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 242.10 (2.89 min). ¹H NMR (300 MHz, CDCl₃) δ 7.22 (d, J=2.3 Hz, 1H), 7.16 (dd, J=8.4, 2.3 Hz, 1H), 6.54 (d, J=8.4 Hz, 1H), 4.79-4.73 (m, 1H), 4.15 (s, 2H), 4.10-4.01 (m, 1H), 3.93-3.85 (m, 1H), 2.26-2.13 (m, 1H), 2.12-1.97 (m, 3H) ppm.

Example 4 Preparation of N-(4-bromo-2-nitro-6-tetrahydrofuran-2-yl-phenyl)-2,2,2-trifluoro-acetamide (6)

To trifluoroacetic anhydride (455.3 mL, 3.275 mol, Sigma-Aldrich 106232) stirring at 2° C. was slowly added 4-bromo-2-tetrahydrofuran-2-yl-aniline (5) (79.29 g, 327.5 mmol) as a thick oil via addition funnel over 15 minutes (reaction temperature rose to 14° C.). The remaining oil was rinsed into the reaction mixture with anhydrous 2-methyltetrahydrofuran (39.6 mL, Sigma-Aldrich 414247). The cold bath was removed and ammonium nitrate (34.08 g, 425.8 mmol, Aldrich 467758) was added. The reaction temperature rose to 40° C. over about 30 minutes at which time a cold water bath was used to control the exotherm and bring the reaction to room temperature. The cold bath was then removed and stirring continued for another 40 minutes (HPLC showed very little remaining un-nitrated material). The reaction mixture was slowly poured into a stirring mixture of crushed ice (800 g). The solid precipitate was collected by filtration, washed with water, saturated aqueous NaHCO₃ (to pH 8), water again, and hexane. The wet solid was dried first in a convection oven at 50° C. for several hours and then under reduced pressure in an oven at 40° C. overnight giving (6) as a light brown solid (77.86 g, 62% yield; 98% HPLC purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 383.19 (3.27 min). ¹H NMR (300 MHz, CDCl₃) δ 9.81 (s, 1H), 8.08 (d, J=2.2 Hz, 1H), 7.73 (d, J=2.2 Hz, 1H), 4.88 (dd, J=9.0, 6.5 Hz, 1H), 4.17-4.08 (m, 1H), 4.03-3.95 (m, 1H), 2.45-2.34 (m, 1H), 2.17-2.06 (m, 2H), 1.96-1.83 (m, 1H) ppm.

Example 5 Preparation of 4-bromo-2-nitro-6-tetrahydrofuran-2-yl-aniline (6a)

Dissolved N-(4-bromo-2-nitro-6-tetrahydrofuran-2-yl-phenyl)-2,2,2-trifluoro-acetamide (6) (54.00 g, 140.9 mmol) in 1,4-dioxane (162 mL) and added aqueous 6 M NaOH (70.45 mL, 422.7 mmol, JT-Baker 567202). The reaction mixture was stirred at reflux for 2 days (HPLC showed complete conversion), allowed to cool, diluted with MTBE (800 mL), washed with water (2×200 mL), saturated aqueous NH₄Cl, water and brine. The mixture was dried over MgSO₄, filtered, and concentrated under reduced pressure to give (6a) as a dark amber oil (40.96 g, 93% yield; overall 92% HPLC plus NMR purity). LCMS (C18 column eluting with 10-90% MeOH/water gradient from 3-5 minutes with formic acid modifier) M+1: 287.28 (3.44 min). ¹H NMR (300 MHz, CDCl₃) δ 8.24 (d, J=2.4 Hz, 1H), 7.41 (d, J=2.3 Hz, 1H), 6.91 (s, 2H), 4.80 (t, J=7.2 Hz, 1H), 4.14-4.05 (m, 1H), 3.98-3.90 (m, 1H), 2.36-2.19 (m, 1H), 2.15-2.01 (m, 3H) ppm.

Example 6 Preparation of 2-[5-(4-amino-3-nitro-5-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (8)

Mixed 4-bromo-2-nitro-6-tetrahydrofuran-2-yl-aniline (6a) (40.40 g, 92%, 129.5 mmol), 1,4-dioxane (260 mL, Sigma-Aldrich 360481), 2-[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-yl]propan-2-ol (7) (41.05 g, 155.4 mmol), and aqueous 2.7 M Na₂CO₃ (143.9 mL, 388.5 mmol). A stream of nitrogen was bubbled through the stirring mixture for 1 hr, followed by addition of tetrakis(triphenylphosphine)palladium (0) (7.48 g, 6.47 mmol, Strem 462150). The reaction mixture was stirred at reflux for 2 hrs (HPLC showed complete reaction), allowed to cool, diluted with EtOAc, washed with water, saturated aqueous NH₄Cl, brine, dried over MgSO₄, and filtered through a short plug of Florisil® eluting with EtOAc. The filtrate was concentrated under reduced pressure giving adark brown oil. Dissolved in CH₂Cl₂ and eluted through a short plug of silica gel with CH₂Cl₂ and then EtOAc. The desired fraction was concentrated on a rotary evaporator until a precipitate formed giving a thick brown slurry, which was triturated with MTBE. The solid was collected by filtration, washed with MTBE, and dried under high vacuum giving (8) as a yellow solid (35.14 g, 99+% HPLC purity,). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 345.00 (2.69 min). ¹H NMR (300 MHz, CDCl₃) δ 8.88 (s, 2H), 8.36 (d, J=2.2 Hz, 1H), 7.56 (d, J=2.1 Hz, 1H), 7.09 (s, 2H), 4.92 (t, J=7.2 Hz, 1H), 4.62 (s, 1H), 4.20-4.11 (m, 1H), 4.03-3.94 (m, 1H), 2.39-2.26 (m, 1H), 2.23-2.08 (m, 3H), 1.64 (s, 6H) ppm. The filtrate was further concentrated and purified by ISCO silica gel chromatography eluting with 0 to 80% EtOAc/hexane giving a second crop of product (8) as an amber solid (4.46 g, 88% overall yield; 88% HPLC purity.

Example 7 Alternate preparation of 2-[5-(4-amino-3-nitro-5-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (8)

Mixed N-(4-bromo-2-nitro-6-tetrahydrofuran-2-yl-phenyl)-2,2,2-trifluoro-acetamide (6) (19.00 g, 49.59 mmol), 2-[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-yl]propan-2-ol (7) (14.41 g, 54.55 mmol), aqueous 2.7 M sodium carbonate (73.48 mL, 198.4 mmol), and 1,4-dioxane (190 mL, Sigma-Aldrich 360481). A stream of nitrogen was bubbled through the stirring mixture for 40 minutes, followed by addition of 1,1′-bis(diphenylphosphino)ferrocene dichloropalladium dichloromethane adduct (2.025 g, 2.480 mmol, Strem 460450). The reaction mixture was stirred at reflux under N₂ for 7 hrs, added another 50 mL of saturated aqueous sodium carbonate, and refluxed for another 16 hrs. The mixture was allowed to cool, then diluted with EtOAc (500 mL) and water (200 mL). The layers were separated and the aqueous phase extracted with EtOAc (200 mL). The combined organic phase was washed with water (500 mL), brine (500 mL), dried over Na₂SO₄, filtered through a Florisil® plug, and concentrated on a rotary evaporator to give crude (8) as an orange oil. Crude product was purified by ISCO silica gel chromatography eluting with 20-90% EtOAc/hexane to give (8) as an orange solid (15.00 g, 87% yield; 81-88% purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 345.35 (2.68 min). ¹H NMR (300 MHz, CDCl₃) δ 8.88 (s, 2H), 8.36 (d, J=2.2 Hz, 1H), 7.56 (d, J=2.1 Hz, 1H), 7.09 (s, 2H), 4.92 (t, J=7.2 Hz, 1H), 4.62 (s, 1H), 4.20-4.11 (m, 1H), 4.03-3.94 (m, 1H), 2.39-2.26 (m, 1H), 2.23-2.08 (m, 3H), 1.64 (s, 6H) ppm.

Example 8 Preparation of 2-[5-(3,4-diamino-5-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (9)

To a suspension of 2-[5-(4-amino-3-nitro-5-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (8) (30.10 g, 87.41 mmol) and THF (90 mL) in a Parr bottle under nitrogen was added a slurry of 5% palladium on carbon (3.01 g, 50% wet, 0.707 mmol, Aldrich 330116) in MeOH (90 mL, JT-Baker 909333), followed by NEt₃ (24.37 mL, 174.8 mmol, Sigma-Aldrich 471283). Placed the vessel on a Parr shaker and saturated with H₂. Added 45 psi H₂ and shook until consumption was complete (HPLC showed complete conversion). The reaction mixture was purged with nitrogen, filtered through Celite™ and rinsed with EtOAc. The filtrate was re-filtered through a 0.5 micron glass fiber filter paper sandwiched between two P5 papers, and concentrated under reduced pressure giving (9) as a light brown foam (28.96 g, 98% yield; 93% NMR purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 315.32 (1.54 min). ¹H NMR (300 MHz, CDCl₃) δ 8.83 (s, 2H), 6.92 (d, J=1.8 Hz, 1H), 6.88 (d, J=1.8 Hz, 1H), 4.90 (dd, J=7.9, 6.2 Hz, 1H), 4.72 (s, 1H), 4.18 (s, 2H), 4.17-4.08 (m, 1H), 3.99-3.89 (m, 1H), 3.46 (s, 2H), 2.34-2.19 (m, 1H), 2.17-2.05 (m, 3H), 1.63 (s, 6H) ppm.

Example 9 Preparation of 1-ethyl-3-[5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-tetrahydrofuran-2-yl-1H-benzimidazol-2-yl]urea (11)

To a stirring solution of 2-[5-(3,4-diamino-5-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (9) (32.10 g, 102.1 mmol) in 1,4-dioxane (160.5 mL, Sigma-Aldrich 360481) was added pH 3.5 buffer (240.8 mL), prepared by dissolving NaOAc trihydrate (34.5 g) in 1N aqueous H₂SO₄ (240 mL). Added 1-ethyl-3-(N-(ethylcarbamoyl)-C-methylsulfanyl-carbonimidoyl)urea (10) (28.46 g, 122.5 mmol, CB Research and Development) and stirred at reflux overnight (HPLC showed 99% consumption of starting diamine). The reaction mixture was cooled to room temperature and poured portion-wise (frothing) into a stirring solution of aqueous saturated NaHCO₃ (480 mL) and water (120 mL) giving pH 8-9. This was stirred for 30 minutes, the solid was collected by filtration, washed copiously with water to neutral pH, and then more sparingly with EtOH. The solid was dried under reduced pressure giving (11) as an off-white solid (34.48 g, 82% yield; 99.4% HPLC purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 411.41 (1.73 min). ¹H NMR (300 MHz, MeOD) δ 9.02 (s, 2H), 7.62 (s, 1H), 7.37 (s, 1H), 5.31 (s, 1H), 4.23 (dd, J=14.5, 7.3 Hz, 1H), 4.01 (dd, J=15.0, 7.1 Hz, 1H), 3.38-3.28 (m, 2H), 2.58-2.46 (m, 1H), 2.16-2.05 (m, 2H), 2.02-1.88 (m, 1H), 1.63 (s, 6H), 1.22 (t, J=7.2 Hz, 3H) ppm.

Example 10 Chiral chromatographic isolation of 1-ethyl-3-[5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (12)

A racemic sample of 1-ethyl-3-[5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-tetrahydrofuran-2-yl-1H-benzimidazol-2-yl]urea (11) (24.60 g) was resolved on a CHIRALPAK® IC® column (by Chiral Technologies) eluting with DCM/MeOH/TEA (60/40/0.1) at 35° C. giving the desired enantiomer (12) as a white solid (11.35 g, 45% yield; 99+% HPLC purity, 99+% ee). Analytical chiral HPLC retention time was 6.2 min (CHIRALPAK® IC® 4.6×250 mm column, 1 mL/min flow rate, 30° C.).

The structure and absolute stereochemistry of 12 were confirmed by single-crystal x-ray diffraction analysis. Single crystal diffraction data were acquired on a Bruker Apex II diffractometer equipped with sealed tube Cu K-alpha source (Cu Kα radiation, γ=1.54178 Å) and an Apex II CCD detector. A crystal with dimensions of ½×0.05×0.05 mm was selected, cleaned using mineral oil, mounted on a MicroMount and centered on a Bruker APEXII system. Three batches of 40 frames separated in reciprocal space were obtained to provide an orientation matrix and initial cell parameters. Final cell parameters were obtained and refined after data collection was completed based on the full data set. Based on systematic absences and intensities statistics the structure was solved and refined in acentric P2₁ space group.

A diffraction data set of reciprocal space was obtained to a resolution of 0.9 Å using 0.5° steps using 60 s exposure for each frame. Data were collected at 100 (2) K. Integration of intensities and refinement of cell parameters were accomplished using APEXII software. Observation of the crystal after data collection showed no signs of decomposition. As shown in FIG. 1, there are two symmetry independent molecules in the structure and both symmetry independent molecules are R isomers.

The data were collected, refined and reduced using the Apex II software. The structure was solved using the SHELXS97 (Sheldrick, 1990); program(s) and the structure refined using the SHELXL97 (Sheldrick, 1997) program. The crystal shows monoclinic cell with P2₁ space group. The lattice parameters are a=9.8423(4) Å, b=10.8426(3) Å, c=19.4441 (7) Å, β=102.966(3)°. Volume=2022.09(12) Å³.

Example 11 Preparation of the methanesulfonic acid salt of 1-ethyl-3-[5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (13)

A stirring suspension of 1-ethyl-3-[5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (12) (9.32 g, 22.71 mmol) in absolute ethanol (93.2 mL) was cooled with an ice-water bath. Added methanesulfonic acid (1.548 mL, 23.85 mmol, Sigma-Aldrich 471356), removed cold bath and stirred at room temperature for 20 minutes. It was concentrated on a rotary evaporator at 35° C. to a thick slurry, diluted with EtOAc, collected the solid by filtration, washed with EtOAc, and dried under reduced pressure giving an initial crop of (13) as a white solid (8.10 g). The filtrate was concentrated on a rotavap giving a yellowish glassy foam, which was dissolved in EtOH, concentrated to a solid slurry, triturated with EtOAc/Et₂O, and collected by filtration. The solid was washed with EtOAc/Et₂O, combined with the first crop, and dried under reduced pressure giving (13) as a white solid (9.89 g, 86% yield; 99+% HPLC purity, 99+% ee). Analytical chiral HPLC shows one enantiomer with retention time of 6.3 min eluting with DCM/MeOH/TEA (60/40/0.1) on a CHIRALPAK® IC® 4.6×250 mm column with 1 mL/min flow rate at 30° C. LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 411.53 (1.74 min). ¹H NMR (300 MHz, MeOD) δ 9.07 (s, 2H), 7.79 (s, 1H), 7.62 (s, 1H), 5.30 (t, J=7.3 Hz, 1H), 4.24 (dd, J=14.6, 7.3 Hz, 1H), 4.04 (dd, J=15.0, 7.6 Hz, 1H), 3.40-3.30 (m, 2H), 2.72 (s, 3H), 2.65-2.54 (m, 1H), 2.20-2.07 (m, 2H), 2.04-1.90 (m, 1H), 1.64 (s, 6H), 1.23 (t, J=7.2 Hz, 3H) ppm.

Example 12 Preparation of 2-(2-fluoro-6-nitro-phenyl)-2,3-dihydrofuran (15A) and 2-(2-fluoro-6-nitro-phenyl)-2,5-dihydrofuran (15B)

2-Bromo-1-fluoro-3-nitro-benzene (14) (200.3 g, 98%, 892.3 mmol, Bosche F6657), 1,4-dioxane (981.5 mL, Sigma-Aldrich 360481), and 2,3-dihydrofuran (2) (341.1 mL, 99%, 4.462 mol, Aldrich 200018) were charged in a reaction flask, followed by N,N-diisopropylethylamine (155.4 mL, 892.3 mmol, Sigma-Aldrich 550043) and bromo(tri-tert-butylphosphine)palladium(I) dimer (6.936 g, 8.923 mmol, Johnson Matthey C4099). The mixture was stirred at reflux for 2 hrs (HPLC showed 98% consumption of starting arylbromide). It was allowed to cool, the precipitate was removed by filtration, rinsed with EtOAc, and the filtrate concentrated in vacuo to a dark reddish brown semi-solid oil. This was dissolved in CH₂Cl₂, eluted through a plug of silica with CH₂Cl₂, and concentrated in vacuo giving a mixture of 15A and 15B as a dark amber oil (291.3 g). The crude product was carried forward without further purification. The major product was 2-(2-fluoro-6-nitro-phenyl)-2,3-dihydrofuran (15A) (96%): LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 210.23 (3.13 min); ¹H NMR (300 MHz, CDCl₃) δ 7.54 (dt, J=8.0, 1.2 Hz, 1H), 7.43 (td, J=8.2, 5.2 Hz, 1H), 7.32 (ddd, J=9.7, 8.3, 1.3 Hz, 1H), 6.33 (dd, J=4.9, 2.4 Hz, 1H), 5.80 (t, J=10.9 Hz, 1H), 5.06 (q, J=2.4 Hz, 1H), 3.18-3.07 (m, 1H), 2.94-2.82 (m, 1H) ppm. The minor product was 2-(2-fluoro-6-nitro-phenyl)-2,5-dihydrofuran (15B) (4%): GCMS (Agilent HP-5MS 30 m×250 μm×0.25 μm column heating at 60° C. for 2 min to 300° C. over 15 min with a 1 mL/min flow rate) M+1: 210 (11.95 min). ¹H NMR (300 MHz, CDCl₃) δ 7.47 (d, J=8.0 Hz, 1H), 7.43-7.34 (m, 1H), 7.30-7.23 (m, 1H), 6.21-6.15 (m, 1H), 6.11-6.06 (m, 1H), 5.97-5.91 (m, 1H), 4.89-4.73 (m, 2H) ppm.

Example 13 Preparation of 3-fluoro-2-tetrahydrofuran-2-yl-aniline (16)

Placed 5% palladium on carbon (37.3 g, 50% wet, 8.76 mmol, Aldrich 330116) in a Parr bottle under nitrogen, followed by MeOH (70 mL, JT-Baker 909333). Added the crude mixture of 2-(2-fluoro-6-nitro-phenyl)-2,3-dihydrofuran and 2-(2-fluoro-6-nitro-phenyl)-2,5-dihydrofuran (15A&15B) (186.6 g, 892.1 mmol) dissolved in MeOH (117 mL), followed by NEt₃ (124.3 mL, 892.1 mmol, Sigma-Aldrich 471283). Placed the vessel on a Parr shaker and saturated with H₂. After adding 45 psi H₂, the reaction mixture was shaken until consumption of the starting material was complete (HPLC and LCMS showed complete reaction). The reaction mixture was purged with nitrogen, filtered through Celite™ and rinsed with EtOAc. The filtrate was concentrated on a rotary evaporator giving a brown oil, which was dissolved in Et₂O and washed with water (2×). The ether phase was extracted with aqueous 1 N HCl (5×250 mL), which was washed with Et₂O (3×) and then basified with aqueous 6 N NaOH to pH 12-14. The basic aqueous phase was extracted with CH₂Cl₂(4×), and the combined organic extract washed with saturated aqueous NH₄Cl, dried over MgSO₄, and filtered through a pad of silica eluting with CH₂Cl₂ to 25% EtOAc/hexane. The desired filtrate was concentrated under reduced pressure giving 16 as a light brown oil (121.8 g, 84% GCMS plus NMR purity). GCMS (Agilent HP-5MS 30 m×250 μm×0.25 μm column heating at 60° C. for 2 min to 300° C. over 15 min with a 1 mL/min flow rate) M+1: 182.0 (11.44 min). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 182.10 (2.61 min). ¹H NMR (300 MHz, CDCl₃) δ 6.97 (td, J=8.1, 6.3 Hz, 1H), 6.43-6.35 (m, 2H), 5.21-5.13 (m, 1H), 4.54 (s, 2H), 4.16-4.07 (m, 1H), 3.90-3.81 (m, 1H), 2.23-2.00 (m, 4H) ppm. Additional crops were obtained as follows: the combined ether phase was washed with saturated aqueous NaHCO₃, brine, dried over Na₂SO₄, decanted, and concentrated under reduced pressure. The oil was vacuum distilled (ca. 15 torr) collecting the distillate at 101-108° C. To a stirring solution of the distilled oil in EtOH (1 volume) at 2° C. was slowly added 5 M HCl (1 eq) in iPrOH. The resulting suspension was brought to room temperature, diluted with EtOAc (3 volumes, vol/vol), and stirred for 2 hrs. The white solid was collected by filtration, washed with EtOAc, and dried under reduced pressure giving a second crop of product as the HCl salt. The mother liquor was concentrated to a slurry, diluted with EtOAc and the solid collected by filtration, washed with EtOAc, and dried in vacuo giving the HCl salt as a third crop of the product. LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 182.10 (2.58 min). ¹H NMR (300 MHz, CDCl₃) δ 10.73 (br.s, 3H), 7.66 (d, J=8.1 Hz, 1H), 7.33 (td, J=8.2, 5.9 Hz, 1H), 7.13-7.05 (m, 1H), 5.26 (dd, J=9.0, 6.5 Hz, 1H), 4.38-4.28 (m, 1H), 4.00-3.91 (m, 1H), 2.59-2.46 (m, 1H), 2.30-1.95 (m, 3H) ppm. The overall yield from the three crops was 76%.

Example 14 Preparation of 4-bromo-3-fluoro-2-tetrahydrofuran-2-yl-aniline (17)

To a stirring solution of 3-fluoro-2-tetrahydrofuran-2-yl-aniline (16) (131.9 g, 92%, 669.7 mmol) in methyl tert-butyl ether (1.456 L) and acetonitrile (485 mL) cooled to −20° C. was added N-bromosuccinimide (120.4 g, 99%, 669.7 mmol, Aldrich B81255) in 3 portions maintaining a reaction temperature below about −15° C. After complete addition stirring was continued at −15 to −10° C. for 30 minutes. ¹H NMR of a worked-up aliquot showed 96% consumption of starting aniline so added another 4.82 g NBS and stirred at −10° C. for another 30 minutes. Aqueous 1 N Na₂S₂O₃ (670 mL) was added to the reaction mixture. The cold bath was removed, the mixture stirred for 20 minutes, then diluted with EtOAc. The layers were separated and the organic phase was washed with saturated aqueous NaHCO₃ (2×), water, brine, dried over Na₂SO₄, decanted, and concentrated under reduced pressure giving a dark amber oil. The residue was diluted with hexane and eluted through a short plug of silica eluting with 25% EtOAc/hexane to 50% EtOAc/hexane. The desired filtrate was concentrated in vacuo giving 17 as a dark amber oil (182.9 g, 90% yield; 86% NMR purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 260.12 (3.20 min). ¹H NMR (300 MHz, CDCl₃) δ 7.15 (dd, J=8.6, 7.6 Hz, 1H), 6.30 (dd, J=8.7, 1.3 Hz, 1H), 5.19-5.12 (m, 1H), 4.58 (s, 2H), 4.16-4.07 (m, 1H), 3.90-3.81 (m, 1H), 2.23-1.99 (m, 4H) ppm.

Example 15 Preparation of N-(4-bromo-3-fluoro-6-nitro-2-tetrahydrofuran-2-yl-phenyl)-2,2,2-trifluoro-acetamide (18)

To trifluoroacetic anhydride (565.3 mL, 4.067 mol, Sigma-Aldrich 106232) stirring at 2° C. was slowly added neat 4-bromo-3-fluoro-2-tetrahydrofuran-2-yl-aniline (17) (123.0 g, 86%, 406.7 mmol) as a thick oil via addition funnel over about 20 minutes (reaction temperature rose to 13° C.). The remaining oil was rinsed into the reaction mixture with anhydrous THF (35 mL). The cold bath was removed and the reaction was heated to 35° C., followed by portion-wise addition of NH₄NO₃ (4.88 g×20 portions, 1.22 mol, Sigma-Aldrich A7455) over 2.5 hrs maintaining the reaction temperature between 30 and 41° C. using an ice-water bath only as needed to control the exotherm. After complete addition the reaction mixture was stirred for another 10 minutes (HPLC showed reaction 99% complete). It was slowly poured into crushed ice (1.23 kg) and stirred for 1 hr to allow formation of a filterable solid precipitate, which was collected and washed with water, sparingly with saturated aqueous NaHCO₃, and water again (to pH 7). The product was dried in a convection oven overnight at 40° C. and then under reduced pressure in an oven at 50° C. overnight giving 18 as a beige solid (152.5 g, 90% yield; 96% HPLC purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 401.30 (3.41 min). ¹H NMR (300 MHz, CDCl₃) δ 10.56 (s, 1H), 8.19 (d, J=6.6 Hz, 1H), 5.22 (dd, J=10.3, 6.4 Hz, 1H), 4.22 (dd, J=15.8, 7.2 Hz, 1H), 3.99 (dd, J=16.1, 7.5 Hz, 1H), 2.50-2.38 (m, 1H), 2.22-2.11 (m, 2H), 1.86-1.71 (m, 1H) ppm.

Example 16 Preparation of 4-bromo-3-fluoro-6-nitro-2-tetrahydrofuran-2-yl-aniline (19)

A reaction flask was charged with N-(4-bromo-3-fluoro-6-nitro-2-tetrahydrofuran-2-yl-phenyl)-2,2,2-trifluoro-acetamide (18) (242.3 g, 604.1 mmol), 1,4-dioxane (1.212 L), aqueous 2 M sulfuric acid (362.4 mL, 724.9 mmol), and stirred at reflux for 5 days (HPLC showed 98% conversion). Allowed to cool, diluted with EtOAc, neutralized with saturated aqueous NaHCO₃, separated the layers, and re-extracted the aqueous phase with EtOAc (2×). The combined organic phase was washed with brine (2×), dried over MgSO₄, filtered and concentrated in vacuo giving 19 as a greenish brown solid (181.7 g, 94% yield; 95% HPLC purity). The product was carried to the next step without further purification. LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 305.20 (3.63 min). ¹H NMR (300 MHz, CDCl₃) δ 8.35 (d, J=7.3 Hz, 1H), 7.45 (s, 2H), 5.23-5.16 (m, 1H), 4.23-4.14 (m, 1H), 3.93-3.84 (m, 1H), 2.31-1.96 (m, 4H) ppm.

Example 17 Preparation of 2-[5-(4-amino-2-fluoro-5-nitro-3-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (20)

To a stirring solution of 4-bromo-3-fluoro-6-nitro-2-tetrahydrofuran-2-yl-aniline (19) (525.0 g, 1.721 mol, Bridge Organics Co.) in 1,4-dioxane (4.20 L, Sigma-Aldrich 360481) was added a 1.2 M aqueous solution of NaHCO₃ (4.302 L, 5.163 mol). A stream of nitrogen was bubbled through the stirring mixture for 2 hrs, followed by addition of 2-[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-yl]propan-2-ol (7) (545.4 g, 2.065 mol, Bridge Organics Co.) and 1,1′-bis(diphenylphosphino)ferrocene dichloropalladium dichloromethane adduct (42.16 g, 51.63 mmol, Strem 460450). The reaction mixture was stirred at reflux overnight, allowed to cool, diluted with EtOAc (8.4 L), and the layers were separated. The organic phase was washed with saturated aqueous NH₄Cl and then brine. The aqueous phase was re-extracted with EtOAc (4 L) and washed this organic extract with brine. The combined organic phase was dried over MgSO₄, filtered through a short plug of Florisil®, eluted with EtOAc, and the filtrate concentrated on a rotary evaporator giving a dark brown wet solid. This was dissolved in CH₂Cl₂, loaded on a pad of silica gel, eluted with hexane, then 25% EtOAc/hexane, and then 50% EtOAc/hexane. The desired filtrate was concentrated on a rotary evaporator to a thick suspension, and the solid was collected by filtration, triturated with MTBE, and dried in vacuo giving 20 as a bright yellow solid (55.8% yield, 90-97% HPLC purity). The filtrate was concentrated and the above purification was repeated giving a second crop of 20 as a bright yellow solid (19.7% yield). The filtrate was again concentrated giving a dark brown oil and this was loaded on a silica column with toluene and minimal CH₂Cl₂. It was eluted with EtOAc/hexane (0% to 50%). The desired fractions were concentrated to a slurry and diluted with MTBE/hexane. The solid was collected by filtration and washed with minimal MTBE giving a third crop of 20 as a bright yellow solid (4.9% yield) with an overall yield of 80% from the three crops. LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 363.48 (2.95 min). ¹H NMR (300 MHz, CDCl₃) δ 8.84 (d, J=1.6 Hz, 2H), 8.27 (d, J=8.0 Hz, 1H), 7.62 (s, 2H), 5.31-5.24 (m, 1H), 4.63 (s, 1H), 4.27-4.18 (m, 1H), 3.97-3.87 (m, 1H), 2.33-2.05 (m, 4H), 1.64 (s, 6H) ppm.

Example 18 Preparation of 2-[5-(4,5-diamino-2-fluoro-3-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (21)

Placed 5% palladium on carbon (14.21 g, 50% wet, 3.339 mmol, Aldrich 330116) in a Parr bottle under nitrogen, followed by MeOH (242 mL, JT-Baker 909333) and NEt₃ (46.54 mL, 333.9 mmol, Sigma-Aldrich 471283). Dissolved 2-[5-(4-amino-2-fluoro-5-nitro-3-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (20) (121.0 g, 333.9 mmol) in hot THF (360 mL), allowed to cool, added to the reaction mixture, and rinsed with another portion of THF (124 mL). Placed the vessel on a Parr shaker and saturated with H₂. Added 45 psi H₂ and shook until consumption was complete (HPLC and LCMS showed complete reaction). The reaction mixture was purged with nitrogen, filtered through Celite™ and rinsed with EtOAc. It was re-filtered through paper (glass microfibre) and the filtrate concentrated in vacuo. Repeated the reaction three more times on the same scale and the batches were combined giving 21 as a brown solid (447 g, 99% yield; 93% HPLC purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 333.46 (1.79 min). ¹H NMR (300 MHz, CDCl₃) δ 8.81 (d, J=1.4 Hz, 2H), 6.69 (d, J=7.3 Hz, 1H), 5.27-5.20 (m, 1H), 4.73 (s, 1H), 4.70 (s, 2H), 4.23-4.14 (m, 1H), 3.94-3.86 (m, 1H), 3.22 (s, 2H), 2.32-2.22 (m, 1H), 2.18-1.99 (m, 3H), 1.63 (s, 6H) ppm.

Example 19 Preparation of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-tetrahydrofuran-2-yl-1H-benzimidazol-2-yl]urea (22)

To a stirring suspension of 2-[5-(4,5-diamino-2-fluoro-3-tetrahydrofuran-2-yl-phenyl)pyrimidin-2-yl]propan-2-ol (21) (111.3 g, 334.9 mmol) and 1,4-dioxane (556.5 mL, Sigma-Aldrich 360481) was added 1-ethyl-3-(N-(ethylcarbamoyl)-C-methylsulfanyl-carbonimidoyl)urea (10) (93.36 g, 401.9 mmol, CB Research and Development) followed by a pH 3.5 buffer (1.113 L), prepared by dissolving NaOAc trihydrate (158.1 g) in 1N aqueous H₂SO₄ (1.100 L). The reaction mixture was stirred at reflux overnight (HPLC showed complete conversion), cooled to room temperature, and poured portion-wise (frothing) into a stirring solution of aqueous saturated NaHCO₃ (2.23 L) giving pH 8-9. This was stirred for 30 minutes, the solid was collected by filtration, washed copiously with water to neutral pH, and then more sparingly with EtOH. The solid was dried under reduced pressure giving 22 as an off-white yellowish solid (135.2 g, 94% yield; 99% HPLC purity). LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 429.58 (2.03 min). ¹H NMR (300 MHz, MeOD) δ 8.95 (d, J=1.6 Hz, 2H), 7.45 (d, J=6.5 Hz, 1H), 5.38 (br.s, 1H), 4.27 (dd, J=14.9, 7.1 Hz, 1H), 4.01 (dd, J=15.1, 7.0 Hz, 1H), 3.37-3.29 (m, 2H), 2.55 (br.s, 1H), 2.19-2.07 (m, 2H), 2.02-1.82 (br.s, 1H), 1.63 (s, 6H), 1.21 (t, J=7.2 Hz, 3H) ppm.

Example 20 Chiral chromatographic isolation of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23)

A racemic sample of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-tetrahydrofuran-2-yl-1H-benzimidazol-2-yl]urea (22) (133.60 g) was resolved on a CHIRALPAK® IC® column (by Chiral Technologies) eluting with DCM/MeOH/TEA (60/40/0.1) at 25° C. giving the desired enantiomer 23 as an off-white solid (66.8 g, 45% yield; 99.8% HPLC purity, 99+% ee). Analytical chiral HPLC retention time was 7.7 min (CHIRALPAK® IC® 4.6×250 mm column, 1 mL/min flow rate, 30° C.). The solid was suspended in 2:1 EtOH/Et₂O (5 volumes), stirred for 10 minutes, collected by filtration, washed with 2:1 EtOH/Et₂O, and dried under reduced pressure giving a white solid (60.6 g).

The structure and absolute stereochemistry of 23 were confirmed by single-crystal x-ray diffraction analysis. Single crystal diffraction data were acquired on a Bruker Apex II diffractometer equipped with sealed tube Cu K-alpha source (Cu Kα radiation, γ=1.54178 Å) and an Apex II CCD detector. A crystal with dimensions of 0.15×0.15×0.10 mm was selected, cleaned using mineral oil, mounted on a MicroMount and centered on a Bruker APEXII system. Three batches of 40 frames separated in reciprocal space were obtained to provide an orientation matrix and initial cell parameters. Final cell parameters were obtained and refined after data collection was completed based on the full data set. Based on systematic absences and intensities statistics the structure was solved and refined in acentric P2₁ space group.

A diffraction data set of reciprocal space was obtained to a resolution of 0.85 Å using 0.5° steps using 30 s exposures for each frame. Data were collected at 100 (2) K. Integration of intensities and refinement of cell parameters were accomplished using APEXII software. Observation of the crystal after data collection showed no signs of decomposition. As shown in FIG. 2, there are two symmetry independent molecules in the structure and both symmetry independent molecules are R isomers.

The data were collected, refined and reduced using the Apex II software. The structure was solved using the SHELXS97 (Sheldrick, 1990); program(s) and the structure refined using the SHELXL97 (Sheldrick, 1997) program. The crystal shows monoclinic cell with P2₁ space group. The lattice parameters are a=9.9016(2) Å, b=10.9184(2) Å, c=19.2975(4) Å, β=102.826(1)°. Volume=2034.19(7) Å³.

Example 21 Preparation of the methanesulfonic acid salt of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23A)

To a stirring suspension of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23) (15.05 g, 35.13 mmol) in dichloromethane (60 mL, J. T. Baker 931533) and absolute ethanol (15 mL, Pharmco-AAPER 111000200) was added methanesulfonic acid (2.392 mL, 36.89 mmol, Sigma-Aldrich 471356). Stirred at room temperature until a clear solution was observed. Added heptane (300 mL) slowly over about 1 hr and collected the solid precipitate by filtration (using a Whatman qualitative #3 paper on top of a Whatman GF/F glass microfibre paper). Dried under reduced pressure in a vacuum oven (desiccated with calcium sulfate and potassium hydroxide) overnight at 40° C. giving 23A as a white solid (13.46 g, 99+% HPLC purity, 99+% ee). Analytical chiral HPLC shows one enantiomer with retention time of 8.6 min eluting with CH₂Cl₂/MeOH/TEA (60/40/0.1) on a CHIRALPAK® IC® 4.6×250 mm column with 1 mL/min flow rate at 30° C. A second crop of white solid product 23A (4.36 g, 98% HPLC purity, 99+% ee) was obtained from the filtrate. LCMS (C18 column eluting with 10-90% CH₃CN/water gradient over 5 minutes with formic acid modifier) M+1: 429.58 (2.03 min). ¹H NMR (300 MHz, MeOD) δ 9.00 (d, J=1.6 Hz, 2H), 7.67 (d, J=6.1 Hz, 1H), 5.39 (t, J=7.7 Hz, 1H), 4.30 (dd, J=14.9, 6.9 Hz, 1H), 4.03 (dd, J=14.8, 7.7 Hz, 1H), 3.40-3.31 (m, 2H), 2.72 (s, 3H), 2.70-2.60 (m, 1H), 2.21-2.08 (m, 2H), 1.98-1.84 (m, 1H), 1.65 (s, 6H), 1.22 (t, J=7.2 Hz, 3H) ppm.

The (R)-1-ethyl-3-(6-fluoro-5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea 23 may then be converted to the phosphate or phosphate salt prodrugs according to the schemes set forth below.

Reagents and conditions: (a) dibenzyl N,N-diisopropylphosphoramidite, tetrazole, 23° C., DMF; (b) mCPBA, 0-23° C., DMF; (c) H₂, Pd/C, M⁺OH⁻ or D²⁺(OH⁻)₂, EtOH, H₂O; (d) aq H⁺; (e) aq M⁺OH⁻.

Compounds of formula (IB) may be prepared from compound 23 as shown in Scheme 1. In Step 1, compound 23 is treated with dibenzyl N,N-diisopropylphosphoramidite and tetrazole, followed by meta-chloroperoxybenzoic acid (mCPBA), to afford dibenzyl phosphate 24. In Step 2, hydrogenolysis of 24 in the presence of M⁺OH⁻ or D²⁺(OH⁻)₂ affords the dianionic form of the compound of formula (IB) (X═—PO(O⁻)₂.2M⁺or —PO(O⁻)₂.D²⁺). The free acid form of the compound of formula (IB) (X═PO(OH)₂) may be obtained by treating the dianionic form with aqueous acid. The monoanionic form of the compound of formula (IB) (X═PO(OH)O⁻M⁺) may be obtained by treating the free acid form with one equivalent of M⁺OH⁻.

Reagents and conditions: (a) Boc₂O, DMF, 23° C.; (b)dibenzyl N,N-diisopropylphosphoramidite, tetrazole, 23° C., DMF; (c) mCPBA, 0-23° C., DMF; (d) TFA, H₂O, MeOH, DCM, 23° C.; (e) H₂, Pd/C, M⁺OH⁻ or D²⁺(OH⁻)₂, EtOH, H₂O; (f) aq H⁺; (g) aq M⁺OH⁻.

Alternatively, the compounds of formula (IB) may be prepared from compound 23 as shown in Scheme 2. In Step 1, compound 23 is treated with di-tert-butyl dicarbonate (Boc₂O) to afford protected benzimidazole compound 25. In Step 2, compound 25 is treated with dibenzyl N,N-diisopropylphosphoramidite and tetrazole, followed by mCPBA, to afford protected dibenzyl phosphate 26. In Step 3, compound 26 is treated with trifluoroacetic acid (TFA) to remove the protecting group and afford dibenzyl phosphate 24. In Step 4, hydrogenolysis of 24 in the presence of M⁺OH⁻ or D²⁺(OH⁻)₂ affords the dianionic form of the compound of formula (IB) (X═—PO(O⁻)₂.2M⁺ or —PO(O⁻)₂.D²⁺). The free acid form of the compound of formula (IB) (X═PO(OH)₂) may be obtained by treating the dianionic form with aqueous acid. The monoanionic form of the compound of formula (I) (X═PO(OH)O⁻M⁺) may be obtained by treating the free acid form with one equivalent of M⁺OH⁻.

Reagents and conditions: (a) Boc₂O, DMAP, DMF, 23° C.; (b) dibenzyl N,N-diisopropylphosphoramidite, tetrazole, 23° C., DMF; (c) mCPBA, 0-23° C., DMF; (d) TFA, DCM; (e) aq M⁺OH⁻ or D² (OH⁻)₂; (f) aq H⁺; (g) aq M⁺OH⁻.

The compounds of formula (IB) may also be prepared from compound 23 as shown in Scheme 3. In Step 1, compound 23 is treated with two equivalents of Boc₂O in the presence of N,N-dimethylaminopyridine (DMAP) to afford bis-protected benzimidazole compound 28. In Step 2, compound 28 is treated with dibenzyl N,N-diisopropylphosphoramidite and tetrazole, followed by mCPBA, to afford bis-protected dibenzyl phosphate 29. In Step 3, compound 29 is treated with TFA to remove the protecting groups. Treatment of the resulting intermediate with aqueous M⁺OH⁻ or D²⁺(OH⁻)₂ affords the dianionic form of the compound of formula (IB) (X═—PO(O⁻)₂.2M⁺ or —PO(O⁻)₂.D²⁺). The free acid form of the compound of formula (IB) (X═PO(OH)₂) may be obtained by treating the dianionic form with aqueous acid. The monoanionic form of the compound of formula (I) (X═PO(OH)O⁻M⁺) may be obtained by treating the free acid form with one equivalent of M⁺OH⁻.

Example 22 Preparation of (R)-dibenzyl 2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (24)

To 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23) (10.24 g, 23.66 mmol) in a 1 L round bottom flask under N₂ at 23° C. was added DMF (200 mL) followed by a solution of tetrazole (105.2 mL of 0.45 M in MeCN, 47.32 mmol) followed by N-dibenzyloxyphosphanyl-N-isopropyl-propan-2-amine (12.26 g, 11.93 mL, 35.49 mmol). After 4.5 h more N-dibenzyloxyphosphanyl-N-isopropyl-propan-2-amine (4 mL) was added. After stirring a further 16 h the reaction was cooled to 0° C. (ice-water bath) then treated with mCPBA (15.17 g, 61.52 mmol). The mixture was stirred at 0° C. for 30 min then at 23° C. for 30 min after which the reaction mixture was partitioned between water (400 mL) and EtOAc (700 mL). The organic layer was separated, washed with saturated aqueous sodium bicarbonate (500 mL), 10% aqueous sodium bisulfite (500 mL), saturated aqueous sodium bicarbonate (500 mL), and brine (500 mL) then dried (magnesium sulfate), filtered and concentrated. The residue was purified by MPLC using an ISCO COMBIFLASH brand flash chromatography purification system (330 g column) eluting with a 0-10% EtOH in DCM linear gradient over 16.5 column volumes at a 200 mL/min flow rate. After concentration in vacuo, (R)-dibenzyl 2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[a]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate(24) (13.89 g, 20.17 mmol, 85.27%) was obtained as a white solid. ESMS (M+1)=689.5; ¹H NMR (300 MHz, CD₃OD) δ 8.88 (d, J=1.6 Hz, 2H), 7.37 (d, J=6 Hz, 1H), 7.30 (m, 10H), 5.38-5.33 (m, 1H), 5.12-5.01 (m, 4H), 4.24 (dd, J=6.8, 14.9 Hz, 1H), 3.98 (dd, J=6.9, 15.1 Hz, 1H), 3.35-3.27 (m, 3H), 2.52 (q, J=5.9 Hz, 1H), 2.14-2.05 (m, 2H), 1.91 (s, 6H) and 1.22-1.14 (m, 3H) ppm.

Example 23 Preparation of disodium (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (W)

A 1 L Parr vessel was charged with water (200 mL), Pd/C (4 g, 10 wt % dry basis, wet, Degussa type), (R)-dibenzyl 2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[c]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate(24) (13.89 g, 20.17 mmol), EtOH (400 mL) and aqueous 1 M NaOH (40.34 mL, 40.34 mmol). The resulting mixture was hydrogenated under 50 psi H₂ on a Parr shaker apparatus for 40 min. The reaction mixture was filtered through a 0.22 μm polyethersulfone (PES) membrane giving a dark colored filtrate. A water rinse resulted in more dark material crossing the filter membrane. The resulting filtrate was passed through a pad of Celite and the dark material did not elute until the pad was rinsed with water. The resulting dark solution (approx. 700 mL) was diluted with three volumes of EtOH (2100 mL), filtered through a 0.22 μm PES membrane (using 4 disposable Corning polystyrene filter systems, #431098) and the filtrate concentrated in vacuo. The resulting residue was dissolved in water (100 mL) and EtOH (300 mL), filtered through a 0.22 μm PES membrane to give a clear yellow solution, then passed through a Celite plug (26 mm diameter×60 mm height, pre-wet with EtOH) rinsing with EtOH (50 mL) and the filtrate then concentrated. The resulting residue was dissolved in water (250 mL) in a 1 L round bottom flask, then 1 M aqueous HCl (40 mL) was slowly added over 15 min with stirring to give a slurry of white solid. Twenty minutes following completion of the HCl addition, the solid was collected via filtration through a 0.22 μm PES membrane. The collected solid was washed with water (100 mL), then transferred (still wet) to a 1 L round bottom flask and slurried in MeOH (150 mL) for 30 min. The resulting fine white precipitate was collected via filtration then dried in vacuo overnight. The resulting free acid (9.17 g, 18.0 mmol) was treated with water (80 mL) then 1.0 N aq NaOH (36.0 mL, 2 equiv). The resulting solution was frozen and lyophilized to give disodium [1-[5-[2-(ethylcarbamoylamino)-6-fluoro-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-5-yl]pyrimidin-2-yl]-1-methyl-ethyl]phosphate (W) (10.206 g, 18.08 mmol, 89.66%) as a pale, cream-colored solid with consistent analytical data. ESMS (M+1)=509.4; ¹H NMR (300 MHz, D₂O) δ 8.58 (s, 2H), 6.92 (d, J=6.3 Hz, 1H), 5.13 (t, J=7.5 Hz, 1H), 3.98-3.81 (m, 2H), 3.04 (q, J=7.2 Hz, 2H), 2.26 (t, J=5.7 Hz, 1H), 1.97-1.92 (m, 2H), 1.67 (s, 6H) and 1.01 (t, J=7.2 Hz, 3H) ppm.

Example 24 Preparation of Boc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (25).

To a solution/suspension of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23) (10.72 g, 25.02 mmol) in DMF (250 mL) at 23° C. was added Boc₂O (6.11 g, 28.00 mmol). After 2 hours, 2 M ammonia in MeOH (2 mL) was added to quench any excess Boc₂O. The quenched reaction mixture was partitioned between EtOAc and water (400 mL each), the organic layer separated, washed with water (2×400 mL) and brine (400 mL), then dried over MgSO₄, filtered and concentrated to give Boc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (25) (12.69 g, 23.58 mmol, 94.26%) which was used without further purification. ESMS (M+1)=529.3; ¹H NMR (300.0 MHz, CDCl₃) δ 9.50 (s, 1H), 9.02 (t, J=5.3 Hz, 1H), 8.91 (d, J=1.6 Hz, 2H), 7.74 (d, J=6.5 Hz, 1H), 5.58 (t, J=7.8 Hz, 1H), 4.64 (s, 1H), 4.22 (q, J=7.4 Hz, 1H), 4.05 (td, J=7.8, 4.3 Hz, 1H), 3.47 (td, J=7.2, 4.3 Hz, 2H), 2.42-2.35 (m, 2H), 2.28-2.16 (m, 2H), 1.75 (s, 9H), 1.68 (s, 6H) and 1.31 (t, J=7.3 Hz, 3H) ppm.

Example 25 Preparation of Boc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea dibenzyl phosphate (26)

To Boc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (25) (12.69 g, 23.58 mmol) and tetrazole (3.304 g, 47.16 mmol) under N₂ at 23° C. was added DCM (240 mL) followed by N-dibenzyloxyphosphanyl-N-isopropyl-propan-2-amine (9.775 g, 9.509 mL, 28.30 mmol). After 3 hours at 23° C., the reaction was cooled to 0° C. then mCPBA (6.977 g, 28.30 mmol) was added. The resulting solution was stirred for 45 min at 0° C. then for 20 min at 23° C. The reaction mixture was then partitioned between DCM (50 mL) and saturated aqueous sodium bicarbonate (400 mL). The organic layer was separated, then washed successively with aqueous sodium bisulfite (63 g in 350 mL water) and saturated aqueous sodium bicarbonate (400 mL), then dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by MPLC using an ISCO COMBIFLASH brand flash chromatography purification system (330 g silica column) eluting with a 0-100% EtOAc in hexanes linear gradient over 16 column volumes at 200 mL/min. Product containing fractions were evaporated in vacuo to give Boc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea dibenzyl phosphate (26) (11.92 g, 15.11 mmol, 64.09%). ESMS (M+1)=789.2; ¹H NMR (300.0 MHz, CDCl₃) δ 9.51 (s, 1H), 9.03 (t, J=5.4 Hz, 1H), 8.91 (d, J=1.6 Hz, 2H), 7.73 (d, J=6.5 Hz, 1H), 7.37-7.28 (m, 10H), 5.58 (t, J=7.8 Hz, 1H), 5.17-5.05 (m, 4H), 4.23 (t, J=7.5 Hz, 1H), 4.05 (td, J=7.8, 4.3 Hz, 1H), 3.53-3.44 (m, 2H), 2.39 (dd, J=7.9, 14.5 Hz, 2H), 2.28-2.15 (m, 2H), 1.98 (s, 6H), 1.72 (m, 9H) and 1.31 (t, J=7.2 Hz, 3H) ppm.

Example 26 Preparation of (R)-dibenzyl 2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (24)

To a solution of Boc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea dibenzyl phosphate (26) (11.9 g, 15.09 mmol) in DCM (300 mL) at 23° C. was added water (2.325 mL, 129.1 mmol) then TFA (3.441 g, 2.325 mL, 30.18 mmol). After 1 h, only partial conversion was observed by tlc, so more TFA (3.441 g, 2.325 mL, 30.18 mmol) was added. After a further 2.5 h, MeOH (2 mL) was added and the mixture stirred a further 18 hours. The reaction mixture was washed with 1:1 brine:saturated aqueous sodium bicarbonate (200 mL). The aqueous layer was re-extracted with DCM (150 mL), the organic layers combined, then dried (over magnesium sulfate), filtered and concentrated in vacuo. The resulting residue was re-dissolved in EtOAc (200 mL) washed with water (150 mL) and brine (100 mL), then dried (magnesium sulfate) filtered and concentrated to give (R)-dibenzyl 2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (24) (10.21 g, 14.83 mmol, 98.27%) as a white solid. ESMS (M+1)=689.4; ¹H NMR (300 MHz, CD₃OD) δ 8.88 (d, J=1.6 Hz, 2H), 7.37 (d, J=6 Hz, 1H), 7.30 (m, 10H), 5.38-5.33 (m, 1H), 5.12-5.01 (m, 4H), 4.24 (dd, J=6.8, 14.9 Hz, 1H), 3.98 (dd, J=6.9, 15.1 Hz, 1H), 3.35-3.27 (m, 3H), 2.52 (q, J=5.9 Hz, 1H), 2.14-2.05 (m, 2H), 1.91 (s, 6H) and 1.22-1.14 (m, 3H) ppm.

Example 27 Preparation of disodium (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (W)

A 1 L round bottom flask was charged with (R)-dibenzyl 2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (24) (9.37 g, 13.61 mmol), EtOH (300 mL), water (150 mL), Pd/C (10 wt % dry basis, wet, Degussa type, 3 g) and 1 M aqueous NaOH (27.22 mL, 27.22 mmol). The suspension was evacuated for 3 min (needle to pump) then placed under an atmosphere of hydrogen gas (balloon). After stirring 2.5 h at 23° C., the reaction was filtered through a 0.22 μm PES membrane (disposable Corning filter system, 1 L, polystyrene, #431098) to remove catalyst and washed with EtOH (50 mL). The resulting solution was concentrated, the residue dissolved in water (80 mL), treated with MeCN (80 mL), then frozen and lyophilized to give disodium (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (W) (7.10 g, 12.81 mmol, 94.12%) as a white solid. ESMS (M+1)=509.3; ¹H NMR (300 MHz, D₂O) δ 8.58 (s, 2H), 6.92 (d, J=6.3 Hz, 1H), 5.13 (t, J=7.5 Hz, 1H), 3.98-3.81 (m, 2H), 3.04 (q, J=7.2 Hz, 2H), 2.26 (t, J=5.7 Hz, 1H), 1.97-1.92 (m, 2H), 1.67 (s, 6H) and 1.01 (t, J=7.2 Hz, 3H) ppm.

Example 28 Preparation of diBoc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (28)

To a solution/suspension of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23) (1.333 g, 3.111 mmol) in DMF (30 mL) was added DMAP (38.01 mg, 0.3111 mmol) followed by Boc₂O (1.426 g, 1.501 mL, 6.533 mmol). After 30 min, the reaction mixture was diluted with water and EtOAc (300 mL each), the organic layer separated, washed with water and brine (300 mL each), then dried over magnesium sulfate, filtered and concentrated. The residue was purified by MPLC using an ISCO COMBIFLASH brand flash chromatography purification system (80 g silica column) eluting with a 0-60% EtOAc in hexanes linear gradient over 20 column volumes at 60 mL/min flow rate. Desired product fractions were combined and evaporated to give diBoc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (28) (1.43 g, 2.275 mmol, 73.11%) as a clear foam. ESMS (M+1)=629.3; ¹H NMR (300.0 MHz, CDCl₃) δ 8.95 (d, J=1.6 Hz, 2H), 8.31-8.27 (m, 1H), 8.05 (d, J=6.5 Hz, 1H), 5.80-5.68 (m, 1H), 4.70 (s, 1H), 4.21-4.09 (m, 1H), 3.98 (d, J=6.4 Hz, 1H), 3.42-3.37 (m, 2H), 2.45-2.00 (m, 4H), 1.65 (s, 6H), 1.62 (s, 9H), 1.37 (s, 9H) and 1.28-1.21 (m, 3H) ppm.

Example 29 Preparation of diBoc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea dibenzyl phosphate (29)

To diBoc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (28) (1.13 g, 1.797 mmol) and tetrazole (251.8 mg, 3.594 mmol) at 23° C. under N₂ was added DCM (30 mL) followed by N-dibenzyloxyphosphanyl-N-isopropyl-propan-2-amine (744.7 mg, 724.4 μL, 2.156 mmol). After stirring for 18 h, the reaction was cooled to 0° C. then treated with mCPBA (531.5 mg, 2.156 mmol). The reaction was stirred for 15 min at 0° C., then for 30 min at 23° C. The resulting solution was then partitioned between EtOAc and saturated aqueous sodium bicarbonate (300 mL each), the organic layer separated, then washed with 10% aqueous sodium bisulfite, saturated aqueous sodium bicarbonate and brine (300 mL each), then dried over magnesium sulfate filtered and concentrated. The residue was purified by MPLC using an ISCO COMBIFLASH brand flash chromatography purification system (80 g silica column) eluting with a 0-80% EtOAc in hexanes linear gradient over 20 column volumes at 60 mL/min flow rate. Desired product fractions were combined and evaporated to give diBoc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea dibenzyl phosphate (29) (1.03 g, 1.159 mmol, 64.50%) as a clear, glassy oil. ESMS (M+1)=889.5; ¹H NMR (300.0 MHz, CDCl₃) δ 8.93 (d, J=1.5 Hz, 2H), 8.31 (s, 1H), 8.04 (d, J=6.4 Hz, 1H), 7.36-7.26 (m, 10H), 5.83-5.70 (m, 1H), 5.16-5.05 (m, 4H), 4.24-4.18 (m, 1H), 4.03-3.97 (m, 1H), 3.42-3.36 (m, 2H), 2.43-2.05 (m, 4H), 1.98 (s, 6H), 1.64 (s, 9H), 1.40 (s, 9H) and 1.26 (t, J=7.2 Hz, 3H) ppm.

Example 30 Preparation of sodium (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (W)

To a solution of diBoc-1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea dibenzyl phosphate (29) (121 mg, 0.1361 mmol) in DCM (10 mL) at 23° C. was added TFA (5 mL). After 2 h, the reaction mixture was concentrated in vacuo. The residue was dissolved in MeOH (6 mL) and treated with approx 0.5 mL 2 M NH₃ in MeOH (to fully dissolve the material). The resulting solution was purified in 6 injections on preparative HPLC, reverse phase, Sunfire prep C18 OBD 5 μM column 19×100 mm; eluting with a10-90% aq MeCN w/0.1% TFA buffer, linear gradient over 15 min at 20 mL/min flow rate. Fractions containing product were pooled and lyophilized. The resulting material was suspended in MeOH (3 mL), stirred at 23° C. for 30 min, then the precipitate was collected via filtration through a plastic frit. The resulting white solid was re-subjected to a MeOH slurry (3 mL), then collected via filtration to give 68 mg of white solid after drying. The white solid was treated with 0.10 M aq NaOH (2.68 mL, 2 equiv NaOH) to give a solution that was then passed through an Acrodisc CR 13 mm syringe filter with 0.45 μm PTFE membrane, flushing with water (2 mL). The resulting solution was treated with MeCN (3 mL), frozen and lyophilized to give sodium (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (W) as a white powder. ESMS (M+1)=509.2; ¹H NMR (300 MHz, D₂O) δ 8.58 (s, 2H), 6.92 (d, J=6.3 Hz, 1H), 5.13 (t, J=7.5 Hz, 1H), 3.98-3.81 (m, 2H), 3.04 (q, J=7.2 Hz, 2H), 2.26 (t, J=5.7 Hz, 1H), 1.97-1.92 (m, 2H), 1.67 (s, 6H) and 1.01 (t, J=7.2 Hz, 3H) ppm.

Example 31

Susceptibility Testing in Liquid Media

Compounds of this invention were tested for antimicrobial activity by susceptibility testing in liquid media. Such assays were performed within the guidelines of the latest CLSI document governing such practices: “M07-A8 Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria that Grow Aerobically; Approved Standard—Eighth Edition (2009)”. Other publications such as “Antibiotics in Laboratory Medicine” (Edited by V. Lorian, Publishers Williams and Wilkins, 1996) provide essential practical techniques in laboratory antibiotic testing. The specific protocols used were as follows:

Protocol #1: Gyrase MIC Determination of Compounds Using Microdilution Broth Method

Materials:

Round bottom 96-well microtiter plates (Costar 3788)

Mueller Hinton II agar plates (MHII; BBL premix)

Mueller Hinton II liquid broth (MHII; BBL premix)

BBL Prompt Inoculation System (Fisher B26306)

Test Reading Mirror (Fisher)

Agar plates with bacteria streaked to single colonies, freshly prepared

Sterile DMSO

Human serum (U.S. Biologicals S1010-51)

Laked horse blood (Quad Five 270-100)

Resazurin 0.01%

Sprague Dawley Rat serum (U.S. Biologicals 1011-90B or Valley BioMedical AS3061 SD)

Pooled Mouse serum (Valley BioMedical AS3054)

Strains (Media, Broth and Agar):

-   -   1. Staphylococcus aureus ATCC #29213

a. MHII

b. MHII+50% human serum

c. MHII+50% rat serum

d. MHII+50% mouse serum

-   -   2. Staphylococcus aureus ATCC #29213 GyrB T1731 (MHII)     -   3. Staphylococcus aureus, JMI collection strains; see table 5         (MHII)     -   4. Staphylococcus epidermidis, JMI collection strains; see table         5 (MHII)     -   5. Enterococcus faecalis ATCC #29212 (MHII+3% laked horse blood)     -   6. Enterococcus faecium ATCC #49624 (MHII+3% laked horse blood)     -   7. Enterococus faecalis, JMI collection strains; see table 5         (MHII+3% laked horse blood)     -   8. Enterococus faecium, JMI collection strains; see table 5         (MHII+3% laked horse blood)     -   9. Streptococcus pneumoniae ATCC #10015 (MHII+3% laked horse         blood)     -   10. Streptococcus pneumoniae, JMI collection strains; see table         5 (MHII+3% laked horse blood)     -   11. β-haemolytic streptococci, Groups A, B, C, G) JMI collection         strains; see table 5 (MHII+3% laked horse blood)     -   12. Bacillus cereus ATCC 10987 (MHII)     -   13. Bacillus cereus ATCC 14579 (MHII)     -   14. Bacillus subtilis ATCC 6638 (MHII)     -   15. Bacillus subtilis (168) ATCC 6051 (MHII)

Inoculum Prep (for all Strains Other than S. Aureus+50% Sera):

-   -   1. Usingthe BBL Prompt kit, picked 5 big or 10 small, well         separated colonies from culture grown on the appropriate agar         medium as indicated above and inoculated 1 mL of sterile saline         provided in the kit.     -   2. Vortexed the wells for ˜30 s to provide a suspension of ˜10⁸         cells/mL. Actual density could be confirmed by plating out         dilutions of this suspension.     -   3. Diluted the suspension 1/100 by transferring 0.15 mL of cells         into 15 mL (˜10⁶ cells/mL) sterile broth (or see below) for each         plate of compounds tested, then swirled to mix. If more than 1         plate of compounds (>8 compounds) were tested, volumes were         increased accordingly.         -   a. For E. faecalis, E. faecium and S. pneumoniae: 14.1 mL             MHII+0.9 mL laked horse blood was used.     -   4. Used 50 μl cells (˜5×10⁴ cells) to inoculate each microtiter         well containing 50 μl of the drug diluted in broth (see below).

Drug Dilutions, Inoculation, MIC Determination:

-   -   1. All drug/compound stocks were prepared at 12.8 mg/mL         concentration, usually in 100% DMSO.     -   2. Diluted drug/compound stocks to 200× desired final         concentration in 50 μL DMSO. If starting concentration of MICs         was 8 μg/mL final concentration, then required 6.25 μL of         stock+43.75 μL DMSO. Each 200× stock was placed in a separate         row of column 1 of a new 96 well microtiter plate.     -   3. Added 25 μL of DMSO to columns 2-12 of all rows of the         microtiter plate containing 200× compound stocks and serially         diluted 25 μL from column 1 through column 11, changed tips         after each column. i.e. 25 μL compound+25 μL DMSO=2× dilution.         Left “no compound” DMSO well at the end of the series for         control.     -   4. For each strain tested (except S. aureus+50% human serum),         prepared two microtiter plates with 50 μL of MHII broth using a         Matrix pipettor.     -   5. Transferred 0.5 μL of each dilution (w/Matrix auto-pipettor)         to 50 μL of medium/microtiter well prior to the addition of 50         μl of cells. The usual starting concentration of compound was 8         μg/mL after the 1/200 dilution into medium+cells−compound         concentrations decreased in 2× steps across the rows of the         microtiter plate. All MICs were done in duplicate.     -   6. All wells were inoculated with 50 μl of diluted cell         suspension (see above) to a final volume of 100 μl.     -   7. After inoculum was added, mixed each well thoroughly with a         manual multichannel pipettor; same tips were used going from low         to high concentration of drug in the same microtiter plate.     -   8. Plates were incubated at 37° C. for at least 18 hours.     -   9. Plates were viewed with a test reading mirror after 18 hours         and the MIC was recorded as the lowest concentration of drug         where no growth was observed (optical clarity in the well).

Preparation of S. Aureus+50% Human Serum, S. Aureus+50% Rat Serum or S. Aureus+50% Mouse Serum.

-   -   1. Prepared 50% serum media by combining 15 mL of MHII+15 mL         human serum—total 30 mL. Increased volume in 30 mL increments         when more than 1 compound plate was tested.     -   2. Used the same BBL Prompt inoculum of S. aureus ATCC #29213 as         described above, diluted 1/200 by transferring 0.15 mL of cells         into 30 mL (˜5×10⁵ cells/mL) of the 50% human serum media         prepared above and swirled to mix.     -   3. Filled all test wells of the desired number of microtiter         plates with 100 μL cells in 50% serum media.     -   4. Transferred 0.5 μL of each compound dilution (w/Matrix         auto-pipettor) to 100 μL of cells/media. The usual starting         concentration of compound was 8 μg/mL after the 1/200 dilution         into medium+cells−compound concentrations decreased in 2× steps         across the rows of a microtiter plate. All MICs were done in         duplicate.     -   5. Mixed each well thoroughly with a manual multichannel         pipettor; same tips were used going from low to high         concentration of drug in the same microtiter plate.     -   6. Plates were incubated at 37° C. for at least 18 hours. After         incubation, added 25 μL of 0.01% Resazurin to each well and         continued to incubate at 37° C. for at least 1 additional hour         or until the Resazurin color changes.     -   7. Plates were viewed with a test reading mirror and the MIC was         recorded. When using Resazurin, the color of the dye changed         from a dark blue to a bright pink in wells with no growth. The         lowest concentration of drug that turned the dye pink was the         MIC.

Protocol 2: Gyrase MIC Determination of Compounds Against Gram Negatives Using Microdilution Broth Method

Materials:

Round bottom 96-well microtiter plates (Costar 3788)

Mueller Hinton II agar plates (MHII; BBL premix)

Mueller Hinton II liquid broth (MHII; BBL premix)

BBL Prompt Inoculation System (Fisher b26306)

Test Reading Mirror (Fisher)

Agar plates with bacteria streaked to single colonies, freshly prepared

Sterile DMSO

Strains (MHII Media for all; Broth and Agar):

-   -   1. Escherichia coli ATCC #25922     -   2. Escherichia coli, JMI collection strains, see table 5     -   3. Escherichia coli AG100 WT     -   4. Escherichia coli AG100 tolC     -   5. Acinetobacter baumannii ATCC #BAA-1710     -   6. Acinetobacter baumannii ATCC #19606     -   7. Acinetobacter baumannii, JMI collection strains, see table 5     -   8. Klebsiella pneumoniae ATCC #BAA-1705     -   9. Klebsiella pneumoniae ATCC #700603     -   10. Klebsiella pneumoniae, JMI collection strains, see table 5     -   11. Moraxella catarrhalis ATCC#25238     -   12. Moraxella catarrhalis ATCC#49143     -   13. Moraxella catarrhalis, JMI collection strains, see table 5     -   14. Haemophilus influenzae ATCC 49247     -   15. Haemophilus influenzae (Rd1 KW20) ATCC 51907     -   16. Haemophilus influenzae Rd0894 (AcrA-)     -   17. Haemophilus influenzae, JMI collection strains, see table 5     -   18. Pseudomonas aeruginosa PAO1     -   19. Pseudomonas aeruginosa, JMI collection strains, see table 5     -   20. Proteus mirabilis, JMI collection strains, see table 5     -   21. Enterobacter cloacae, JMI collection strains, see table 5     -   22. Stenotrophomonas maltophilia ATCC BAA-84     -   23. Stenotrophomonas maltophilia ATCC13637     -   Inoculum Prep:     -   1. Using the BBL Prompt kit, picked 5 big or 10 small, well         separated colonies from cultures grown on agar medium and         inoculated 1 mL sterile saline that came with the kit.     -   2. Vortexed the wells for ˜30 s to give a suspension of ˜10⁸         cells/mL. Actual density could be confirmed by plating out         dilutions of this suspension.     -   3. Diluted the suspension 1/100 by transferring 0.15 mL of cells         into 15 mL (˜10⁶ cells/mL) sterile broth (see below) for each         plate of compounds tested, swirled to mix. If more than 1 plate         of compounds (>8 compounds) was to be tested, increased volumes         accordingly.     -   4. Used 50 μl cells (−5×10⁴ cells) to inoculate each microtiter         well containing 50 μl of the drug diluted in broth (see below).

Drug Dilutions, Inoculation, MIC Determination:

-   -   1. All drug/compound stocks were prepared at 12.8 mg/mL         concentration, usually in 100% DMSO.     -   2. Diluted drug/compound stocks to 200× desired final         concentration in 50 μL DMSO. If starting concentration of MICs         was 8 μg/mL final concentration, then required 6.25 μL of         stock+43.75 μL DMSO. Each 200× stock was placed in a separate         row of column 1 of a new 96 well microtiter plate.     -   3. Added 25 μL of DMSO to columns 2-12 of all rows of the         microtiter plate containing 200× compound stocks and serially         diluted 25 μL from column 1 through column 11, changed tips         after each column. i.e. 25 μL compound+25 μL DMSO=2× dilution.         Left “no compound” DMSO well at the end of the series for         control.     -   4. For each strain tested, prepared two microtiter plates with         50 μL of MHII broth using a Matrix pipettor.     -   5. Transferred 0.5 μL of each dilution (w/Matrix auto-pipettor)         to 50 μL of medium/microtiter well prior to the addition of 50         μl of cells. The usual starting concentration of compound was 8         μg/mL after the 1/200 dilution into medium+cells−compound         concentrations decreased in 2× steps across the rows of a         microtiter plate. All MICs were done in duplicate.     -   6. All wells were inoculated with 50 μl of diluted cell         suspension (see above) to a final volume of 100 μl.     -   7. After inoculum was added, each well was mixed thoroughly with         a manual multichannel pipettor; same tips were used going from         low to high concentration of drug in the same microtiter plate.     -   8. Plates were incubated at 37° C. for at least 18 hours.     -   9. Plates were viewed with a test reading mirror after 18 hours         and the MIC was recorded as the lowest concentration of drug         where no growth was observed (optical clarity in the well).

Protocol #3: Gyrase MIC Determination of Compounds Using Agar Dilution Method

Materials:

Petri plates 60×15 mm (Thermo Scientific Cat. #12567100)

Centrifuge tubes, 15 mL (Costar)

BBL Prompt Inoculation System (Fisher b26306)

Agar plates with bacteria streaked to single colonies, freshly prepared

Sterile DMSO

GasPak™ incubation containers (BD Cat. #260672)

GasPak™ EZ Anaerobe container system sachets (BD Cat. #260678)

GasPak™ EZ C02 container system sachets (BD Cat. #260679)

GasPak™ EZ Campy container system sachets (BD Cat. #260680)

Strains:

-   -   1. Clostridium difficile ATCC BAA-1382;     -   2. Clostridium difficile, CMI collection strains, see table 4     -   3. Clostridium perfringens, CMI collection strains, see table 4     -   4. Bacteroides fragilis and Bacteroides spp., CMI collection         strains, see table 4     -   5. Fusobacterium spp., CMI collection strains, see table 4     -   6. Peptostreptococcus, spp., CMI collections strains, see table         4     -   7. Prevotella spp., CMI collection strains, see table 4     -   8. N. gonorrhoeae ATCC 35541     -   9. N. gonorrhoeae ATCC 49226     -   10. Neisseria gonorrhoeae, JMI collection strains, see table 4     -   11. Neisseria meningitidis, JMI collection strains, see table 4

Media Preparation and Growth Conditions:

-   -   Growth medium recommended for each microbial species was         prepared according to the CLSI publication ‘M11-A7 Methods for         Antimicrobial Susceptibility Testing of Anaerobic Bacteria;         Approved Standard—Seventh Edition (2007)’ with the exception         of N. gonorrhoeae and N. meningitidis for which media was         prepared according to“M07-A8 Methods for Dilution Antimicrobial         Susceptibility Tests for Bacteria that Grow Aerobically;         Approved Standard—Eighth Edition (2009)”.

Plate Pouring:

-   -   1. Prepared 100× drug stocks of each test compound as described         in Table 1. Used a 15 mL centrifuge tube, added 100 uL of each         drug stock to 10 mL of molten agar (cooled to ˜55° C. in water         bath). Mixed by inverting tube 2-3× then pour into individually         labeled 60×15 mm Petri dish.     -   2. Routine test concentrations were: 0.002 ug/mL-16 ug/mL (14         plates).     -   3. Poured 4 drug free plates: 2 as positive control, 2 as         aerobic control.     -   4. Allowed plates to dry. Used same day or stored overnight at         RT or stored up to 3 days at 4° C.     -   5. Plates were labeled accordingly for drug concentration and         strain placement.

Growth of Cells Requiring the Maintenance of an Anaerobic Environment:

-   -   1. All work performed with anaerobic bacteria was done as         rapidly as possible; work performed in biosafety cabinets (i.e.,         aerobic environment) was completed in less then 30 minutes         before cells were returned to anaerobic chambers.     -   2. Incubation of anaerobic bacteria was achieved using GasPak™         chambers. The large box style chambers (VWR 90003-636) required         2 anaerobic sachets (VWR 90003-642), while the tall cylinder         style chambers (VWR 90003-602) only required 1 sachet.

Plate Inoculation (Performed in Biosafety Cabinet):

-   -   1. Streaked each strain onto individual agar plates as described         above. Incubated for required time and environmental condition         (i.e. anaerobic, microaerophilic, etc).     -   2. Used direct colony suspension method to suspend loopfuls of         freshly streaked cells into ˜4 mL 0.9% NaCl₂ and vortexed.     -   3. Adjusted suspension to O.D.₆₀₀ 0.05 (5×10e7 cfu/mL). Vortexed         to mix.     -   4. Transferred ˜0.2 mL of adjusted, mixed cultures to a 96 well         plate. When ≦5 strains were tested, all strains were lined         together in a single row. When testing >5 strains, transferred         strains into plate with no more that 5 strains in a single row.         This was necessary to fit on the small plates.     -   5. Used multi-channel pipettor, spotted 0.002 mL of each strain         from prepared 96 well plates onto each MIC test plate. This         resulted in ˜1×10e5 cfu/spot. When testing C. difficile, strains         swarmed when grown, however distance between multi-channel         pipettor spots was far enough such that swarming cells did not         impair assay results.         -   a. Inoculated 2 drug free plates first, while the other 2             drug free plates were inoculated last after the MIC test             plates. The former and latter served as growth and             inoculation controls. Incubated one plate from each set of             drug-free controls under required atmospheric conditions             with MIC plates and one set aerobically to test for             contamination with aerobic bacteria. Aerobic culture was             negative for growth when working with strict anaerobe or             microaerophilic strain. Some growth was visible with N.             gonorrhoeae.     -   6. Allowed inoculum to dry (for as short a time as necessary),         then placed upside down in GasPak with appropriate number of         sachets and incubate.     -   7. Neisseria spp. were incubated at 37° C. in a5% CO₂         environment for 24 h.

MIC Determination:

Examined the test plates after the correct incubation time and read the MIC endpoint at the concentration where a marked reduction occurred in the appearance of growth on the test plate as compared to that of growth on the positive control plates.

TABLE 1 Compound dilutions for MIC determination using the agar dilution method. Final Volume Volume Diluent, Intermediate Conc. (uL) added Stock from stock DMSO Conc. At 1:100 to 10 mL Step (ug/ml) Source (uL) (uL)** (ug/mL) (ug/mL) agar 1  1,600* Stock 1,600 16 100 2 1,600 Stock 75 75 800 8 100 3 1,600 Stock 75 225 400 4 100 4 1,600 Stock 75 525 200 2 100 5   200 Step 4 75 75 100 1 100 6   200 Step 4 75 225 50 0.5 100 7   200 Step 4 75 525 25 0.25 100 8   25 Step 7 75 75 12.5 0.125 100 9   25 Step 7 75 225 6.25 0.06 100 10   25 Step 7 75 525 3.1 0.03 100 11    3 Step 75 75 1.6 0.016 100 10 12    3 Step 75 225 0.8 0.008 100 10 13    3 Step 75 525 0.4 0.004 100 10 14    0.4 Step 75 75 0.2 0.002 100 13 *1,600 ug/ml = 64 ul (10 mg/ml stock) + 336 ul DMSO; 400 ul total volume to start **compound dissolved and diluted in 100% DMSO

Protocol 4. MIC Determination Procedure for Mycobacterium species

Materials

Round bottom 96-well microtiter plates (Costar 3788) or similar

Film plate seals (PerkinElmer, TopSeal-A #6005250 or similar)

Middlebrook 7H10 broth with 0.2% glycerol

Middlebrook 7H10 agar with 0.2% glycerol

Middlebrook OADC Enrichment

Inoculum Preparation for M. tuberculosis:

-   -   1. Used prepared frozen M. tuberculosis stock stored at         −70° C. M. tuberculosis was grown in 7H10 broth+10% OADC, then         frozen at a concentration of 100 Klett or 5×10⁷ cfu/ml,     -   2. Prepared a 1:20 dilution by removal of 1 ml of the frozen         stock and added it to 19 ml of 7H10 broth+10% OADC (final         concentration 2.5×10⁶ cfu/ml).     -   3. From this dilution prepared a second 1:20 dilution, removed 1         ml and added it to 19 ml of fresh broth. This was the final         inoculum to add to the 96-well plates.

Inoculum Preparation for M. kansasii, M. avium, M. abscessus and Nocardia spc.:

-   -   1. Used prepared frozen stock of culture or a fresh culture         grown in 7H10 broth at a concentration of 10 Klett or 5×10⁷/ml.     -   2. Prepared a 1:20 dilution by removing 1.0 ml of the culture         stock and added it to 19 ml of 7H10 broth (final concentration         2.5×10⁶ cfu/ml).     -   3. From this dilution prepared a 1:20 dilution, removed 1 ml and         added it to 19 ml of fresh broth (final suspension).

Plate Preparation:

-   -   1. Labeled plates.     -   2. Added 50 μl of 7H10 broth+10% OADC to all wells being         utilized for MIC determination using a multichannel electronic         pipettor.     -   3. Prepared stock solutions of drugs (e.g. 1 mg/ml         concentration) to be tested.     -   4. Thawed and diluted frozen stock solutions using 7H10         broth+10% OADC to obtain a working solution 4× the maximum         concentration tested (e.g. final concentration 32 μg/ml, highest         concentration tested was 8 μg/ml). Dilutions were made from the         stock solution. To start at a concentration of 1 μg/ml, the         drugs were prepared at 4 μg/ml, so the starting concentration         was 1 μg/ml. Removed 25 μl of the 1 mg/ml stock and added to 6.2         ml of broth. All dilutions of drugs were done in broth.     -   5. Added 50 μl of the 4× working solution to the first well of         the designated row. Continued for all compounds to be tested.         Using a multichannel electronic pipettor, mixed 4× and serial         diluted compounds through the 11th well. Discarded remaining 50         μl. Used the 12th well as the positive control.     -   6. Incubated plates at 37° C. M. tuberculosis for ˜18 days; M.         avium and M. kansasii for ˜7 days; Nocardia and M. abcessus for         ˜4 days; with film seals.     -   7. Read visually and recorded the results. The MIC was recorded         as the lowest concentration of drug where no growth was observed         (optical clarity in the well).

Protocol 5. Protocol for Mycobacterium tuberculosis Serum Shift MIC Assay

Materials and Reagents:

Costar #3904 Black-sided, flat-bottom 96-well microtiter plates

Middlebrook 7H9 broth (BD271310) with 0.2% glycerol

Middlebrook OADC Enrichment

Fetal Bovine Serum

Catalase (Sigma C1345)

Dextrose

NaCl₂

BBL Prompt Inoculation System (Fisher b26306)

Agar plates (Middlebrook 7H11 with 0.2% glycerol and OADC enrichment) with bacteria streaked to single colonies

Sterile DMSO

Media prep:

-   -   1. For serum shifted MICs, three different media were required         which all had a base of 7H9+0.2% glycerol. It was important that         all media and supplements were sterilized prior to MICs.     -   2. Prepared all media below and inoculated as described in next         section. Tested all compounds against Mtb using each media.         -   a. 7H9+0.2% glycerol+10% OADC (“standard” MIC media).         -   b. 7H9+0.2% glycerol+2 g/L dextrose+0.85 g/L NaCl+0.003 g/L             catalase (0% FBS).         -   c. 2×7H9+0.2% glycerol+2 g/L dextrose+0.85 g/L NaCl+0.003             g/L catalase combined with equal volume Fetal Bovine Serum             (50% FBS).

Inoculum Prep:

-   -   1. Using BBL Prompt, picked 5-10 well-separated colonies and         inoculated 1 ml sterile saline that came in the kit. Typically         plates were two to three weeks of age when used for this assay         due to the slow growth of this organism in culture.     -   2. Vortexed well, then sonicated in water bath for 30 sec         providing a suspension of ˜10⁸ cells/ml. Actual density could be         confirmed by plating out dilutions of this suspension.     -   3. Prepared inoculum in each of the three media formulations by         diluting the BBL

Prompt suspension 1/200 (for example: transferred 0.2 ml of cells to 40 ml of medium) to obtain a starting cell density of ˜10⁶ cells/ml.

-   -   4. Used 100 μl cells (˜5×10⁴ cells) to inoculate each microtiter         well containing 1 μl of drug in DMSO (see below).

Drug Dilutions, Inoculation, MIC Determination:

-   -   1. Control drug stocks Isoniazid and Novobiocin were prepared at         10 mM in 100% DMSO while Ciprofloxacin and Rifampin were         prepared at 1 mM in 50% DMSO and 100% DMSO, respectively.         Prepared dilutions-dispensed 100 μL of the stock solution into         the first column of a 96-well plate. Prepared 11-step, 2-fold         serial dilutions across the row for each compound by         transferring 50 μl from column 1 into 50 μl of DMSO in column 2.         Continued to transfer 50 μL from column 2 through column 11         while mixing and changing tips at each column. Left column 12         with DMSO only as a control.     -   2. Transferred 1 μl of each dilution into an empty microtiter         well prior to the addition of 100 μl of cells. The starting         concentration of Isoniazid and Novobiocin was 100 μM after the         dilution into medium+cells; the starting concentration of         Ciprofloxacin and Rifampin was 10 μM after the dilution into         medium+cells. Compound concentrations decreased in 2× steps         moving across the rows of the microtiter plate. All MICs were         done in duplicate at each of the three medium conditions.     -   3. Test sets of compounds were typically at 10 mM and 50 μL,         volume.     -   4. Used a multichannel pipettor, removed all of the volume from         each column of the master plate and transferred into the first         column of a new 96-well microtiter plate. Repeated for each         column of compounds on master plate, transferring into column 1         of a new 96-well plate.     -   5. As described above for control compounds, generated 2-fold,         11-point dilutions of each compound using DMSO as diluent. In         all cases, left column 12 as DMSO only for a control. Once all         dilutions were complete, again transferred 1 μl of each dilution         into an empty microtiter well prior to the addition of 100 μl of         cells as done for the control compounds.     -   6. All wells were inoculated with 100 μl of diluted cell         suspension (see above).     -   7. After inoculum addition, mixed plates by gently tapping sides         of plate.     -   8. Plates were incubated in a humidified 37° C. chamber for 9         days.     -   9. At 9 days added 25 μl 0.01% sterile resazurin to each well.         Measured background fluorescence at Excitation 492 nm, Emission         595 nm and returned the plate to the incubator for another 24         hours.

After 24 hours the fluorescence of each well was measured at Excitation 492 nm, Emission 595 nm.

Percent inhibition by a given compound was calculated as follows: Percent inhibition=100−([well fluorescence-average background fluorescence]/[DMSO control−average background fluorescence]×100). MICs were scored for all three medium conditions as the lowest compound concentration that inhibited resazurin reduction (‘%-inhibition’) signal ≧70% at a given medium condition.

Table 2 shows the results of the MIC assay for selected compounds of this invention.

In Table 2 and in subsequent Tables and Examples, “Compound 12” corresponds to 1-ethyl-3-[5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea and “Compound 13” relates to the mesylate salt of Compound 12. Similarly, “Compound 23” corresponds to 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea and “Compound 23A” relates to the mesylate salt of Compound 23. These are the same numbers used to identify said compounds and salts as used in the Examples above.

TABLE 2 MIC Values of Selected Compounds MIC (μg/ml) Compound Compound Strain/Special Condition Protocol 13 23A Staphylococcus aureus 1 0.13 0.021 ATCC 29213 Staphylococcus aureus ATCC 1 0.31 0.15 29213 with Human Serum Staphylococcus aureus 1 0.53 0.18 ATCC 29213 with Rat Serum Staphylococcus aureus 1 2 0.5 ATCC 29213 with Mouse Serum Staphylococcus aureus 1 1.29 0.3 ATCC 29213 GyrB T173I Enterococcus faecalis ATCC 1 0.081 0.028 29212, with Laked Horse Blood Enterococcus faecium ATCC 1 0.39 0.11 49624 with Laked Horse Blood Enterococcus faecium ATCC 1 0.25 0.11 49624 Streptococcus pneumoniae 1 0.022 0.01 ATCC 10015, with Laked Horse Blood Bacillus cereus ATCC 10987 1 0.5 0.031 Bacillus cereus ATCC 14579 1 0.5 0.031 Bacillus subtilis ATCC 6638 1 >8 2 Bacillus subtilis (168) ATCC 1 >8 4 6051 Clostridium difficile ATCC 3 1 0.38 BAA-1382 Haemophilus influenzae 2 1 0.5 ATCC 49247 Haemophilus influenzae (Rd1 2 2.5 1.3 KW20) ATCC 51907 Haemophilus influenzae 2 0.14 0.041 Rd0894 (AcrA-) Moraxella catarrhalis ATCC 2 0.071 ≦0.016 25238 Moraxella catarrhalis ATCC 2 0.04 ≦0.016 49143 Neisseria gonorrhoeae 3 1.3 0.42 ATCC 35541 Neisseria gonorrhoeae 3 2.3 1 ATCC 49226 Escherichia coli AG100 WT 2 >16 4 Escherichia coli AG100 tolC 2 0.11 0.063 Escherichia coli ATCC 2 16 12 25922 Escherichia coli CHE30 2 >16 8 Escherichia coli CHE30 tolC 2 0.5 0.125 Escherichia coli MC4100 2 >16 >16 Escherichia coli MC4100 2 1 0.25 tolC Klebsiella pneumoniae 2 >16 16 ATCC 700603 Klebsiella pneumoniae 2 >16 12 ATCC BAA-1705 Acinetobacter baumannii 2 >16 8 ATCC 19606 Acinetobacter baumannii 2 >16 6 ATCC BAA-1710 Pseudomonas aeruginosa 2 >16 >16 PAO1 Pseudomonas aeruginosa 2 0.33 0.25 PAO750 Stenotrophomonas 2 Not done >8 maltophilia ATCC BAA-84 Stenotrophomonas 2 Not done >8 maltophilia ATCC13637 Mycobacterium avium 103 4 0.47 0.18 M. avium Far 4 0.94 0.23 M. avium 3404.4 4 0.94 0.23 Nocardia caviae 2497 4 2 0.125 N. asteroids 2039 4 8 1 N. nova 10 4 8 1 M. kansasii 303 4 Not Done 0.03 M. kansasii 316 4 Not Done 0.06 M. kansasii 379 4 Not Done <0.015 M. tuberculosis H37Rv 4 0.37 0.015 ATCC 25618 M. tuberculosis Erdman 4 0.25 0.06 ATCC 35801 M. tuberculosis Erdman 5 0.045 0.03 ATCC 35801 M. tuberculosis Erdman 5 2 0.5 ATCC 35801 with Mouse Serum M. abscessus BB2 4 Not Done 1 M. abscessus MC 6005 4 Not Done 1 M. abscessus MC 5931 4 Not Done 0.5 M. abscessus MC 5605 4 Not Done 1.5 M. abscessus MC 6025 4 Not Done 0.75 M. abscessus MC 5908 4 Not Done 1.5 M. abscessus BB3 4 Not Done 0.5 M. abscessus BB4 4 Not Done 2 M. abscessus BB5 4 Not Done 0.5 M. abscessus MC 5922 4 Not Done 0.25 M. abscessus MC 5960 4 Not Done 0.5 M. abscessus BB1 4 Not Done 2 M. abscessus MC 5812 4 Not Done 1 M. abscessus MC 5901 4 Not Done 1 M. abscessus BB6 4 Not Done 0.5 M. abscessus BB8 4 Not Done 0.5 M. abscessus MC 5908 4 Not Done 1 M. abscessus LT 949 4 Not Done 1 M. abscessus BB10 4 Not Done 0.015 M. abscessus MC 6142 4 Not Done 0.5 M. abscessus MC 6136 4 Not Done 0.5 M. abscessus MC 6111 4 Not Done 0.5 M. abscessus MC 6153 4 Not Done 1

Table 3 shows the results of the MIC90 assay for selected compounds of this invention.

TABLE 3 MIC90 Values of Selected Compounds with Panels of Gram Positive, Gram Negative and Anaerobic Pathogens Number of Compound 13 Compound 23A Isolates Range MIC90 Range MIC90 Organism Tested Protocol (μg/ml) (μg/ml) (μg/ml) (μg/ml) Aerobic Gram- positive Staphylococcus 67 1 0.03-0.5 0.25 0.008-0.06 0.03 aureus Staphlococcus 35 1  0.03-0.25 0.12 0.008-0.03 0.03 epidermidis Enterococcus faecalis 34 1  0.03-0.25 0.25 0.015-0.12 0.06 Enterococcus faecium 33 1 0.12-0.5 0.5 0.003-0.25 0.12 Streptococcus 67 1 0.015-0.06 0.06 0.008-0.03 0.015 pneumoniae β-haemolytic 28 1 0.06-0.5 0.25 0.015-0.12 0.12 streptococci (Groups A, B, C and G) Aerobic Gram- negative Haemophilus 55 2 0.25-8   2 0.06-2   1 influenzae Moraxella catarrhalis 26 2 0.015-0.12 0.12 ≦0.004-0.03   0.03 Acinetobacter 12 2  >8->8 >8   4->8 >8 baumannii Pseudomonas 12 2  >8->8 >8   >8->8 >8 aeruginosa Escherichia coli 12 2  >8->8 >8   2->8 >8 Klebsiella 12 2  >8->8 >8   2->8 >8 pneumoniae Proteus mirabilis 12 2  >8->8 >8   4->8 >8 Enterobacter cloacae 12 2  >8->8 >8   >8->8 >8 Neisseria 13 3 0.5-1  1  0.12-0.25 0.25 gonorrhoeae Neisseria meningitidis 12 3 0.015-0.25 0.12 0.008-0.06 0.03 Anaerobes Bacteroides and 26 3    2->16 >16 0.12-16  16 Parabacter spp. Bacteroides fragilis 25 3    8->16 >16  1-16 16 Clostridium difficile 16 3  0.5-16 1 0.06-4   0.25 Clostridium 12 3 0.12-0.5 0.5 0.12-0.5 0.5 perfringens Fusobacterium spp. 16 3  1-4 2 0.015->16  >16 Peptostreptococcus 11 3  0.06->16 >16  0.03->16 >16 spp. Prevotella spp. 13 3   0.5->16 >16 0.06-16  16

Table 3A also shows the results of the MIC assays for selected compounds of this invention. In Table 3A, “Compound 23A” corresponds to the methanesulfonic acid salt of 1-ethyl-3-[6-fluoro-5-[2-(1-hydroxy-1-methyl-ethyl)pyrimidin-5-yl]-7-[(2R)-tetrahydrofuran-2-yl]-1H-benzimidazol-2-yl]urea (23A). Similarly, “Compound W” corresponds to disodium (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl phosphate (W). These are the same numbers used to identify said compounds in the synthetic Examples above.

TABLE 3A MIC Values of Selected Compounds MIC (μg/ml) Strain Pro- Compound Compound Strain/Special Condition Source tocol 23A W Staphylococcus aureus ATCC¹ 1 0.021 8 ATCC 29213 Staphylococcus aureus ATCC 1 0.15 8 ATCC 29213 with Human Serum Staphylococcus aureus ATCC 1 0.18 8 ATCC 29213 with Rat Serum Staphylococcus aureus ATCC 1 0.5 8 ATCC 29213 with Mouse Serum Staphylococcus aureus Vertex² 1 0.3 >8 ATCC 29213 GyrB T173I Enterococcus faecalis ATCC 1 0.028 1 ATCC 29212, with Laked Horse Blood Enterococcus faecium ATCC 1 0.11 2 ATCC 49624 with Laked Horse Blood Streptococcus pneumoniae ATCC 1 0.01 0.25 ATCC 10015, with Laked Horse Blood Haemophilus influenzae ATCC 2 1.3 8 (Rd1 KW20) ATCC 51907 Haemophilus influenzae Hiroshi 2 0.041 0.25 Rd0894 (AcrA-) Nikaido Escherichia coli CGSC³ 2 4 >16 AG100 WT Escherichia coli Vertex 2 0.063 8 AG100 tolC⁴ ¹American Type Culture Collection ²Constructed by Vertex ³ Coli Genetic Stock Center ⁴all tolC constructs are tolC::Tn10 derived from CAG12184 (Coli Genetic Stock Center)

In Table 4 below, the term “CMI” stands for The Clinical Microbiology Institute located in Wilsonville, Oreg.

TABLE 4 Panels of Anaerobic Organism Used to GenerateMIC90 Data CMI# ORGANISM A2380 B. fragilis A2381 B. fragilis A2382 B. fragilis A2486 B. fragilis A2487 B. fragilis A2489 B. fragilis A2527 B. fragilis A2529 B. fragilis A2562 B. fragilis A2627 B. fragilis A2802 B. fragilis A2803 B. fragilis A2804 B. fragilis A2805 B. fragilis A2806 B. fragilis A2807 B. fragilis A2808 B. fragilis A2809 B. fragilis A2810 B. fragilis A2811 B. fragilis A2812 B. fragilis A2813 B. fragilis A2814 B. fragilis A2460 B. thetaiotaomicron A2462 B. thetaiotaomicron A2463 B. thetaiotaomicron A2464 B. thetaiotaomicron A2536 B. thetaiotaomicron A2591 B. uniformis A2604 B. vulgatus A2606 B. vulgatus A2613 B. ovatus A2616 B. ovatus A2815 Bacteroides tectum A2816 B. ureolyticus A2817 Bacteroides capillosus A2818 B. ureolyticus A2824 Parabacter distasonis A2825 B. ovatus A2826 B. uniformis A2827 B. uniformis A2828 B. vulgatus A2829 B. vulgatus A2830 B. ovatus A2831 B. thetaiotaomicron A2832 Parabacter distasonis A2833 B. thetaiotaomicron A2767 C. difficile A2768 C. difficile A2769 C. difficile A2770 C. difficile A2771 C. difficile A2772 C. difficile A2773 C. difficile A2774 C. difficile A2775 C. difficile A2776 C. difficile A2777 C. difficile A2778 C. difficile A2779 C. difficile A2780 C. difficile A2140 C. perfringens A2203 C. perfringens A2204 C. perfringens A2227 C. perfringens A2228 C. perfringens A2229 C. perfringens A2315 C. perfringens A2332 C. perfringens A2333 C. perfringens A2334 C. perfringens A2389 C. perfringens A2390 C. perfringens A864 F. necrophorum A871 F. nucleatum A1667 F. necrophorum A1666 F. necrophorum A2249 F. nucleatum A2716 Fusobacterium species A2717 Fusobacterium species A2719 Fusobacterium species A2721 Fusobacterium species A2722 Fusobacterium species A2710 Fusobacterium species A2711 Fusobacterium species A2712 Fusobacterium species A2713 Fusobacterium species A2714 Fusobacterium species A2715 Fusobacterium species A1594 Peptostreptococcus anaerobius A2158 Peptostreptococcus magnus A2168 Peptostreptococcus anaerobius A2170 Peptostreptococcus magnus A2171 Peptostreptococcus magnus A2575 Peptostreptococcus spp. A2579 Peptostreptococcus asaccharolyticus A2580 Peptostreptococcus asaccharolyticus A2614 Peptostreptococcus asaccharolyticus A2620 Peptostreptococcus asaccharolyticus A2629 Peptostreptococcus spp. A2739 Prevotella denticola A2752 Prevotella bivia A2753 Prevotella intermedia A2754 Prevotella intermedia A2756 Prevotella bivia A2759 Prevotella bivia A2760 Prevotella denticola A2761 Prevotella intermedia A2762 Prevotella melaninogenica A2765 Prevotella melaninogenica A2766 Prevotella melaninogenica A2821 Prevotella bivia A2822 Prevotella bivia QCBF B. fragilis QCBT B. thetaiotaomicron QCCD C. difficile QCBF B. fragilis QCBT B. thetaiotaomicron QCCD C. difficile

In Table 5 below, the term “JMI” stands for The Jones Microbiology Institute located in North Liberty, Iowa.

TABLE 5 Panels of Gram Positive and Gram Negative Organism Used to GenerateMIC90 Data JMI Organism JMI Isolate # Code Organism 394 ACB Acinetobacter baumannii 2166 ACB Acinetobacter baumannii 3060 ACB Acinetobacter baumannii 3170 ACB Acinetobacter baumannii 9328 ACB Acinetobacter baumannii 9922 ACB Acinetobacter baumannii 13618 ACB Acinetobacter baumannii 14308 ACB Acinetobacter baumannii 17086 ACB Acinetobacter baumannii 17176 ACB Acinetobacter baumannii 30554 ACB Acinetobacter baumannii 32007 ACB Acinetobacter baumannii 1192 ECL Enterobacter cloacae 3096 ECL Enterobacter cloacae 5534 ECL Enterobacter cloacae 6487 ECL Enterobacter cloacae 9592 ECL Enterobacter cloacae 11680 ECL Enterobacter cloacae 12573 ECL Enterobacter cloacae 12735 ECL Enterobacter cloacae 13057 ECL Enterobacter cloacae 18048 ECL Enterobacter cloacae 25173 ECL Enterobacter cloacae 29443 ECL Enterobacter cloacae 44 EF Enterococcus faecalis 355 EF Enterococcus faecalis 886 EF Enterococcus faecalis 955 EF Enterococcus faecalis 1000 EF Enterococcus faecalis 1053 EF Enterococcus faecalis 1142 EF Enterococcus faecalis 1325 EF Enterococcus faecalis 1446 EF Enterococcus faecalis 2014 EF Enterococcus faecalis 2103 EF Enterococcus faecalis 2255 EF Enterococcus faecalis 2978 EF Enterococcus faecalis 2986 EF Enterococcus faecalis 5027 EF Enterococcus faecalis 5270 EF Enterococcus faecalis 5874 EF Enterococcus faecalis 7430 EF Enterococcus faecalis 7904 EF Enterococcus faecalis 8092 EF Enterococcus faecalis 8691 EF Enterococcus faecalis 9090 EF Enterococcus faecalis 10795 EF Enterococcus faecalis 14104 EF Enterococcus faecalis 16481 EF Enterococcus faecalis 18217 EF Enterococcus faecalis 22442 EF Enterococcus faecalis 25726 EF Enterococcus faecalis 26143 EF Enterococcus faecalis 28131 EF Enterococcus faecalis 29765 EF Enterococcus faecalis 30279 EF Enterococcus faecalis 31234 EF Enterococcus faecalis 31673 EF Enterococcus faecalis 115 EFM Enterococcus faecium 227 EFM Enterococcus faecium 414 EFM Enterococcus faecium 712 EFM Enterococcus faecium 870 EFM Enterococcus faecium 911 EFM Enterococcus faecium 2356 EFM Enterococcus faecium 2364 EFM Enterococcus faecium 2762 EFM Enterococcus faecium 3062 EFM Enterococcus faecium 4464 EFM Enterococcus faecium 4473 EFM Enterococcus faecium 4653 EFM Enterococcus faecium 4679 EFM Enterococcus faecium 6803 EFM Enterococcus faecium 6836 EFM Enterococcus faecium 8280 EFM Enterococcus faecium 8702 EFM Enterococcus faecium 9855 EFM Enterococcus faecium 10766 EFM Enterococcus faecium 12799 EFM Enterococcus faecium 13556 EFM Enterococcus faecium 13783 EFM Enterococcus faecium 14687 EFM Enterococcus faecium 15268 EFM Enterococcus faecium 15525 EFM Enterococcus faecium 15538 EFM Enterococcus faecium 18102 EFM Enterococcus faecium 18306 EFM Enterococcus faecium 19967 EFM Enterococcus faecium 22428 EFM Enterococcus faecium 23482 EFM Enterococcus faecium 29658 EFM Enterococcus faecium 597 EC Escherichia coli 847 EC Escherichia coli 1451 EC Escherichia coli 8682 EC Escherichia coli 11199 EC Escherichia coli 12583 EC Escherichia coli 12792 EC Escherichia coli 13265 EC Escherichia coli 14594 EC Escherichia coli 22148 EC Escherichia coli 29743 EC Escherichia coli 30426 EC Escherichia coli 470 BSA Group A Streptococcus 2965 BSA Group A Streptococcus 3112 BSA Group A Streptococcus 3637 BSA Group A Streptococcus 4393 BSA Group A Streptococcus 4546 BSA Group A Streptococcus 4615 BSA Group A Streptococcus 5848 BSA Group A Streptococcus 6194 BSA Group A Streptococcus 8816 BSA Group A Streptococcus 11814 BSA Group A Streptococcus 16977 BSA Group A Streptococcus 18083 BSA Group A Streptococcus 18821 BSA Group A Streptococcus 25178 BSA Group A Streptococcus 30704 BSA Group A Streptococcus 12 BSB Group B Streptococcus 10366 BSB Group B Streptococcus 10611 BSB Group B Streptococcus 16786 BSB Group B Streptococcus 18833 BSB Group B Streptococcus 30225 BSB Group B Streptococcus 10422 BSC Group C Streptococcus 14209 BSC Group C Streptococcus 29732 BSC Group C Streptococcus 8544 BSG Group G Streptococcus 18086 BSG Group G Streptococcus 29815 BSG Group G Streptococcus 147 HI Haemophilus influenzae 180 HI Haemophilus influenzae 934 HI Haemophilus influenzae 970 HI Haemophilus influenzae 1298 HI Haemophilus influenzae 1819 HI Haemophilus influenzae 1915 HI Haemophilus influenzae 2000 HI Haemophilus influenzae 2562 HI Haemophilus influenzae 2821 HI Haemophilus influenzae 3133 HI Haemophilus influenzae 3140 HI Haemophilus influenzae 3497 HI Haemophilus influenzae 3508 HI Haemophilus influenzae 3535 HI Haemophilus influenzae 4082 HI Haemophilus influenzae 4108 HI Haemophilus influenzae 4422 HI Haemophilus influenzae 4868 HI Haemophilus influenzae 4872 HI Haemophilus influenzae 5858 HI Haemophilus influenzae 6258 HI Haemophilus influenzae 6875 HI Haemophilus influenzae 7063 HI Haemophilus influenzae 7600 HI Haemophilus influenzae 8465 HI Haemophilus influenzae 10280 HI Haemophilus influenzae 10732 HI Haemophilus influenzae 10850 HI Haemophilus influenzae 11366 HI Haemophilus influenzae 11716 HI Haemophilus influenzae 11724 HI Haemophilus influenzae 11908 HI Haemophilus influenzae 12093 HI Haemophilus influenzae 12107 HI Haemophilus influenzae 13424 HI Haemophilus influenzae 13439 HI Haemophilus influenzae 13672 HI Haemophilus influenzae 13687 HI Haemophilus influenzae 13792 HI Haemophilus influenzae 13793 HI Haemophilus influenzae 14440 HI Haemophilus influenzae 15351 HI Haemophilus influenzae 15356 HI Haemophilus influenzae 15678 HI Haemophilus influenzae 15800 HI Haemophilus influenzae 17841 HI Haemophilus influenzae 18614 HI Haemophilus influenzae 25195 HI Haemophilus influenzae 27021 HI Haemophilus influenzae 28326 HI Haemophilus influenzae 28332 HI Haemophilus influenzae 29918 HI Haemophilus influenzae 29923 HI Haemophilus influenzae 31911 HI Haemophilus influenzae 428 KPN Klebsiella pneumoniae 791 KPN Klebsiella pneumoniae 836 KPN Klebsiella pneumoniae 1422 KPN Klebsiella pneumoniae 1674 KPN Klebsiella pneumoniae 1883 KPN Klebsiella pneumoniae 6486 KPN Klebsiella pneumoniae 8789 KPN Klebsiella pneumoniae 10705 KPN Klebsiella pneumoniae 11123 KPN Klebsiella pneumoniae 28148 KPN Klebsiella pneumoniae 29432 KPN Klebsiella pneumoniae 937 MCAT Moraxella catarrhalis 1290 MCAT Moraxella catarrhalis 1830 MCAT Moraxella catarrhalis 1903 MCAT Moraxella catarrhalis 4346 MCAT Moraxella catarrhalis 4880 MCAT Moraxella catarrhalis 6241 MCAT Moraxella catarrhalis 6551 MCAT Moraxella catarrhalis 7074 MCAT Moraxella catarrhalis 7259 MCAT Moraxella catarrhalis 7544 MCAT Moraxella catarrhalis 8142 MCAT Moraxella catarrhalis 8451 MCAT Moraxella catarrhalis 9246 MCAT Moraxella catarrhalis 9996 MCAT Moraxella catarrhalis 12158 MCAT Moraxella catarrhalis 13443 MCAT Moraxella catarrhalis 13692 MCAT Moraxella catarrhalis 13817 MCAT Moraxella catarrhalis 14431 MCAT Moraxella catarrhalis 14762 MCAT Moraxella catarrhalis 14842 MCAT Moraxella catarrhalis 15361 MCAT Moraxella catarrhalis 15741 MCAT Moraxella catarrhalis 17843 MCAT Moraxella catarrhalis 18639 MCAT Moraxella catarrhalis 241 GC Neisseria gonorrhoeae 291 GC Neisseria gonorrhoeae 293 GC Neisseria gonorrhoeae 344 GC Neisseria gonorrhoeae 451 GC Neisseria gonorrhoeae 474 GC Neisseria gonorrhoeae 491 GC Neisseria gonorrhoeae 493 GC Neisseria gonorrhoeae 503 GC Neisseria gonorrhoeae 521 GC Neisseria gonorrhoeae 552 GC Neisseria gonorrhoeae 573 GC Neisseria gonorrhoeae 592 GC Neisseria gonorrhoeae 25 NM Neisseria meningitidis 813 NM Neisseria meningitidis 1725 NM Neisseria meningitidis 2747 NM Neisseria meningitidis 3201 NM Neisseria meningitidis 3335 NM Neisseria meningitidis 7053 NM Neisseria meningitidis 9407 NM Neisseria meningitidis 10447 NM Neisseria meningitidis 12685 NM Neisseria meningitidis 12841 NM Neisseria meningitidis 14038 NM Neisseria meningitidis 1127 PM Proteus mirabilis 3049 PM Proteus mirabilis 4471 PM Proteus mirabilis 8793 PM Proteus mirabilis 10702 PM Proteus mirabilis 11218 PM Proteus mirabilis 14662 PM Proteus mirabilis 17072 PM Proteus mirabilis 19059 PM Proteus mirabilis 23367 PM Proteus mirabilis 29819 PM Proteus mirabilis 31419 PM Proteus mirabilis 1881 PSA Pseudomonas aeruginosa 5061 PSA Pseudomonas aeruginosa 7909 PSA Pseudomonas aeruginosa 8713 PSA Pseudomonas aeruginosa 14318 PSA Pseudomonas aeruginosa 14772 PSA Pseudomonas aeruginosa 15512 PSA Pseudomonas aeruginosa 17093 PSA Pseudomonas aeruginosa 17802 PSA Pseudomonas aeruginosa 19661 PSA Pseudomonas aeruginosa 29967 PSA Pseudomonas aeruginosa 31539 PSA Pseudomonas aeruginosa 82 SA Staphylococcus aureus 99 SA Staphylococcus aureus 138 SA Staphylococcus aureus 139 SA Staphylococcus aureus 140 SA Staphylococcus aureus 141 SA Staphylococcus aureus 142 SA Staphylococcus aureus 272 SA Staphylococcus aureus 287 SA Staphylococcus aureus 354 SA Staphylococcus aureus 382 SA Staphylococcus aureus 1112 SA Staphylococcus aureus 1687 SA Staphylococcus aureus 1848 SA Staphylococcus aureus 2031 SA Staphylococcus aureus 2159 SA Staphylococcus aureus 2645 SA Staphylococcus aureus 3256 SA Staphylococcus aureus 3276 SA Staphylococcus aureus 4044 SA Staphylococcus aureus 4214 SA Staphylococcus aureus 4217 SA Staphylococcus aureus 4220 SA Staphylococcus aureus 4231 SA Staphylococcus aureus 4240 SA Staphylococcus aureus 4262 SA Staphylococcus aureus 4370 SA Staphylococcus aureus 4665 SA Staphylococcus aureus 4666 SA Staphylococcus aureus 4667 SA Staphylococcus aureus 5026 SA Staphylococcus aureus 5666 SA Staphylococcus aureus 6792 SA Staphylococcus aureus 7023 SA Staphylococcus aureus 7461 SA Staphylococcus aureus 7899 SA Staphylococcus aureus 7901 SA Staphylococcus aureus 8714 SA Staphylococcus aureus 9374 SA Staphylococcus aureus 9437 SA Staphylococcus aureus 10056 SA Staphylococcus aureus 10110 SA Staphylococcus aureus 11379 SA Staphylococcus aureus 11629 SA Staphylococcus aureus 11659 SA Staphylococcus aureus 12788 SA Staphylococcus aureus 12789 SA Staphylococcus aureus 13043 SA Staphylococcus aureus 13086 SA Staphylococcus aureus 13721 SA Staphylococcus aureus 13742 SA Staphylococcus aureus 13932 SA Staphylococcus aureus 14210 SA Staphylococcus aureus 14384 SA Staphylococcus aureus 15428 SA Staphylococcus aureus 15430 SA Staphylococcus aureus 17721 SA Staphylococcus aureus 18688 SA Staphylococcus aureus 19095 SA Staphylococcus aureus 20195 SA Staphylococcus aureus 22141 SA Staphylococcus aureus 22689 SA Staphylococcus aureus 27398 SA Staphylococcus aureus 29048 SA Staphylococcus aureus 29051 SA Staphylococcus aureus 30491 SA Staphylococcus aureus 30538 SA Staphylococcus aureus 25 SEPI Staphylococcus epidermidis 53 SEPI Staphylococcus epidermidis 385 SEPI Staphylococcus epidermidis 398 SEPI Staphylococcus epidermidis 701 SEPI Staphylococcus epidermidis 713 SEPI Staphylococcus epidermidis 1381 SEPI Staphylococcus epidermidis 2174 SEPI Staphylococcus epidermidis 2286 SEPI Staphylococcus epidermidis 2969 SEPI Staphylococcus epidermidis 3417 SEPI Staphylococcus epidermidis 3447 SEPI Staphylococcus epidermidis 4753 SEPI Staphylococcus epidermidis 7241 SEPI Staphylococcus epidermidis 9366 SEPI Staphylococcus epidermidis 10665 SEPI Staphylococcus epidermidis 11792 SEPI Staphylococcus epidermidis 12311 SEPI Staphylococcus epidermidis 13036 SEPI Staphylococcus epidermidis 13227 SEPI Staphylococcus epidermidis 13243 SEPI Staphylococcus epidermidis 13621 SEPI Staphylococcus epidermidis 13638 SEPI Staphylococcus epidermidis 13800 SEPI Staphylococcus epidermidis 14078 SEPI Staphylococcus epidermidis 14392 SEPI Staphylococcus epidermidis 15007 SEPI Staphylococcus epidermidis 16733 SEPI Staphylococcus epidermidis 18871 SEPI Staphylococcus epidermidis 23285 SEPI Staphylococcus epidermidis 27805 SEPI Staphylococcus epidermidis 29679 SEPI Staphylococcus epidermidis 29985 SEPI Staphylococcus epidermidis 30259 SEPI Staphylococcus epidermidis 31444 SEPI Staphylococcus epidermidis 268 SPN Streptococcus pneumoniae 1264 SPN Streptococcus pneumoniae 2482 SPN Streptococcus pneumoniae 2653 SPN Streptococcus pneumoniae 2994 SPN Streptococcus pneumoniae 3123 SPN Streptococcus pneumoniae 3124 SPN Streptococcus pneumoniae 4336 SPN Streptococcus pneumoniae 4858 SPN Streptococcus pneumoniae 5606 SPN Streptococcus pneumoniae 5881 SPN Streptococcus pneumoniae 5897 SPN Streptococcus pneumoniae 5900 SPN Streptococcus pneumoniae 6051 SPN Streptococcus pneumoniae 6216 SPN Streptococcus pneumoniae 6556 SPN Streptococcus pneumoniae 7270 SPN Streptococcus pneumoniae 7584 SPN Streptococcus pneumoniae 8479 SPN Streptococcus pneumoniae 8501 SPN Streptococcus pneumoniae 9256 SPN Streptococcus pneumoniae 9257 SPN Streptococcus pneumoniae 10246 SPN Streptococcus pneumoniae 10467 SPN Streptococcus pneumoniae 10886 SPN Streptococcus pneumoniae 11217 SPN Streptococcus pneumoniae 11228 SPN Streptococcus pneumoniae 11238 SPN Streptococcus pneumoniae 11757 SPN Streptococcus pneumoniae 11768 SPN Streptococcus pneumoniae 12121 SPN Streptococcus pneumoniae 12124 SPN Streptococcus pneumoniae 12149 SPN Streptococcus pneumoniae 12767 SPN Streptococcus pneumoniae 12988 SPN Streptococcus pneumoniae 13321 SPN Streptococcus pneumoniae 13393 SPN Streptococcus pneumoniae 13521 SPN Streptococcus pneumoniae 13544 SPN Streptococcus pneumoniae 13700 SPN Streptococcus pneumoniae 13704 SPN Streptococcus pneumoniae 13822 SPN Streptococcus pneumoniae 13838 SPN Streptococcus pneumoniae 14131 SPN Streptococcus pneumoniae 14413 SPN Streptococcus pneumoniae 14744 SPN Streptococcus pneumoniae 14808 SPN Streptococcus pneumoniae 14827 SPN Streptococcus pneumoniae 14835 SPN Streptococcus pneumoniae 14836 SPN Streptococcus pneumoniae 15832 SPN Streptococcus pneumoniae 17336 SPN Streptococcus pneumoniae 17343 SPN Streptococcus pneumoniae 17349 SPN Streptococcus pneumoniae 17735 SPN Streptococcus pneumoniae 18060 SPN Streptococcus pneumoniae 18567 SPN Streptococcus pneumoniae 18595 SPN Streptococcus pneumoniae 19082 SPN Streptococcus pneumoniae 19826 SPN Streptococcus pneumoniae 22174 SPN Streptococcus pneumoniae 22175 SPN Streptococcus pneumoniae 27003 SPN Streptococcus pneumoniae 28310 SPN Streptococcus pneumoniae 28312 SPN Streptococcus pneumoniae 29890 SPN Streptococcus pneumoniae 29910 SPN Streptococcus pneumoniae

Example 32

Mouse S. Aureus Kidney Infection Model

Animals: female CD-1 mice (8-10 weeks of age; 6/group), were obtained from Charles River Laboratories and were housed and maintained in accordance with the Guide to the Care and Use of Experimental Animals.

Bacterial Strain and Stocks

Methicillin-sensitive S. aureus (MSSA) strain ATCC 29213 was obtained from the American Type Culture Collection. To prepare stocks for animal studies S. aureus was plated on Mueller Hinton Agar plates and incubated at 37° C. overnight. 3-4 colonies from the plate were used to inoculate 5 mL Mueller Hinton Broth (MHB) that was incubated for 8 hours at 37° C. with shaking at 300 RPM. The 5 mL 8-hour culture was diluted 20-fold into 100 mL and incubated overnight (12-14 hours). The bacteria were pelleted for 20 minutes at 3000× and washed twice with Phosphate-Buffered Saline (PBS) containing 0.5% Bovine Serum Albumin (BSA). Aliquots (1 mL) containing ˜1×10¹° cfu in PBS/20% Glycerol were frozen and stored at −80° C. until the day of use. Stock titers were confirmed by serial dilution and plating on Mueller Hinton agar plates.

Mouse S. Aureus Kidney Infection Model

-   -   Prior to inoculation, bacterial stocks were thawed and washed         once with PBS/BSA. The stocks were then diluted with PBS/BSA to         a final concentration of 1×10⁹ cfu/mL to give an inoculum of         approximately 1−2×10⁸ cfu per mouse in a volume of 100 uL. This         inoculum was found to be optimal in preliminary experiments that         utilized challenge doses of 10⁶-10⁹ S. aureus organisms/mouse to         establish a ˜10⁶ cfu/kidneys burden at 26 hours post infection         without mortality (data not shown). In these preliminary studies         challenge with S. aureus at less than 10⁷ cfu/mouse induced         inconsistent or no chronic infections, whereas a dose of 10⁹         cfu/mouse resulted in rapid illness and mortality in a high         percentage of the mice. Injections were given intravenously via         the tail vein using a sterile 30 gauge needle. Upon completion         of the mouse infections, the bacterial stocks used to challenge         the mice were plated and counted to verify the concentration of         the inocula.

To assess the bacterial burden at the indicated times post infection (most commonly 2 to 26 hours), mice were euthanized and the kidneys were aseptically harvested, and placed into sterile PBS/BSA (5 mL/pair kidneys). Kidneys were homogenized under sterile conditions, using a hand held homogenizer (Powergen 125; Fisher Scientific). During collection and homogenization all of the samples were kept on ice and the homogenizer was washed thoroughly and sterilized between each sample. Homogenates were serially diluted in sterile PBS/BSA and plated on MH agar to determine bacterial counts per pair of kidneys.

TABLE 6 Compound 23A Reduces S. aureus Burdens in the Mouse S. aureus Kidney Infection Model Time of Treatment 24 Hours 30 Minutes 6 Hours Log Median Log Median Log Median Difference Kidney Difference Kidney Difference Kidney vs. Burden (Log vs. Vehicle Burden (Log vs. Vehicle Burden (Log Vehicle cfu/kidneys) Control cfu/kidneys) Control cfu/kidneys) Control Vehicle 4.97 5.21 6.35 10 mg/kg 4.84 −0.14 4.84 −0.37 4.48 −1.87 Compound 23A 30 mg/kg 4.97 0.00 4.62 −0.59 3.44 −2.90 Compound 23A 100 mg/kg 4.89 −0.08 4.55 −0.66 3.49 −2.86 Compound 23A

CD-1 mice (6/group) were challenged IV with S. aureus (ATCC 29213) at 2×10⁸ cfu/mouse. Two hours post challenge mice were treated via oral gavage with Vehicle (10% VitE TPGS) at 10 ml/kg or Compound 23A at 10, 30, 100 mg/kg. The 30-minute and 6-hour treatment groups were treated once, while the 24-hour group received a second treatment 10 hours after the first dose. After increasing amounts of time post treatment (30 minutes, 6 hours or 24 hours), the mice were euthanized and the kidneys harvested, homogenized and plated to quantitate S. aureus burdens. Burdens from pairs of kidneys for each mouse and the median for each group of mice werecalculated.

Results: Orally administered Compound 23A exhibited in vivo efficacy against experimentally induced kidney MSSA (SA 29213) infection. At 30 minutes after the initial treatment there was no difference in kidney burden between compound- and vehicle-treated mice. The 30 minute vehicle-treated group served as early control for comparison of compound effects at later time points. At 6 hours after the first dose, all compound treatments reduced bacterial burdens in the kidneys by 0.4-0.6 logs versus time-matched vehicle control. Additionally, Compound 23A administered at 30 and 100 mg/kg provided 0.3-0.4 log reduction versus the 30 minute early control. After a treatment period of 24 hours (that included a second dose of treatment administered at 10 hours), a decrease in bacterial density compared to time-matched vehicle control was observed for all treatment groups. Compound 23A administered at 30 and 100 mg/kg BID provided 2.8-2.9 log reduction, whereas 10 mg/kg Compound 23A BID was more variable and provided a 1.8 log reduction versus the 24-hour vehicle-treated control. In addition, Compound 23A administered at 30 and 100 mg/kg showed approximately 1.5 log reductions versus the 30-minute vehicle-treated control, indicative of bactericidal activity.

In summary and as shown above in Table 6, BID dosing of 30 and 100 mg/kg Compound 23A diminished bacterial growth of methicillin-sensitive S. aureus (MSSA) strain ATCC 29213 as compared to the 30 minute control group at both the 6 hours and 24 hour assessment times while treatment with 10 mg/kg Compound 23A limited bacterial growth at 6 hours but was less effective than other treatment groups at 24 hours.

TABLE 7 A Single Dose of Compound 23A Reduces S. aureus Burdens in the Mouse S. aureus Kidney Infection Model Median Log Log Kidney Reduction Reduction Burden (Log vs. Early vs. Late Treatment Group cfu/kidneys) Control Control Early Control 4.73 Late Control 6.63 1.90 10 mg/kg Compound 23A 4.73 0.00 −1.90 30 mg/kg Compound 23A 4.32 −0.40 −2.31 60 mg/kg Compound 23A 3.52 −1.21 −3.11 100 mg/kg Compound 23A 3.31 −1.42 −3.32

CD-1 mice (6/group) were challenged IV with S. aureus (ATCC 29213) at 2×10⁸ cfu/mouse. After 2 hours a single group of mice (Early Control (EC)) was euthanized and the kidneys harvested, homogenized and plated to quantitate S. aureus burdens. The additional groups of infected mice were treated via oral gavage with Vehicle at 10 ml/kg (10% VitE TPGS; Late Control, LC), Compound 23A at 10, 30, 60, 100 mg/kg. After 24 hours the groups of treated mice were euthanized and the kidneys harvested, homogenized and plated to quantitate S. aureus burdens. Burdens from pairs of kidneys for each mouse and the median for each group of mice were summarized.

Results: In summary and as shown above in Table 7, a single oral dose of Compound 23A exhibited in vivo efficacy against an experimentally induced kidney MSSA (SA 29213) infection. After 24 hours all treatments showed decreases in bacterial density compared to time-matched vehicle control. Compound 23A demonstrated dose-dependent reductions of 1.9, 2.3, 3.1 and 3.3 log reductions versus vehicle control when administered at 10, 30, 60 or 100 mg/kg. In addition, doses of 60 and 100 mg/kg Compound 23A reduced bacterial burdens versus the early control by 1.2-1.4 logs suggesting Compound 23A has bactericidal activity.

TABLE 7A A Single Dose of Compound W Reduces Bacterial Burdens in the Mouse MSSA Kidney Infection Model Median Log₁₀ Log₁₀ Treatment Group Kidney Difference Difference (Compound W Single Burden (Log₁₀ vs. Early vs. Late Dose Equivalent) CFU/kidneys) Control Control Early Control 4.40 Late Control 5.94 1.54 16 (10) mg/kg Compound W 3.69 −0.71 −2.25 49 (30) mg/kg Compound W 3.22 −1.18 −2.72 99 (60) mg/kg Compound W 3.32 −1.08 −2.62 166 (100) mg/kg Compound W 2.94 −1.46 −3.00

CD-1 mice (8/group) were challenged IV with S. aureus (ATCC 29213) at 2×10⁸ cfu/mouse. After 2 hours a single group of mice (Early Control (EC)) was euthanized and the kidneys harvested, homogenized and plated to quantitate S. aureus burdens. The additional groups of infected mice were treated via oral gavage with Vehicle at 10 ml/kg (Water; Late Control, LC), Compound W was administered at 16, 49, 99 or 166 mg/kg nominal dose levels that were expected to deliver 10, 30, 60 or 100 mg/kg of Compound 23A, the active moiety dose equivalents upon complete conversion at 10, 30, 60, 100 mg/kg. After 24 hours the groups of treated mice were euthanized and the kidneys harvested, homogenized and plated to quantitate S. aureus burdens. Burdens from pairs of kidneys for each mouse and the median for each group of mice were summarized.

Results: In summary and as shown above in Table 8, a single oral dose of Compound W exhibited in vivo efficacy against an experimentally induced kidney MSSA (SA 29213) infection. After 24 hours all treatments showed decreases in bacterial density compared to time-matched vehicle control. Compound W demonstrated dose-dependent reductions of 1.9, 2.3, 2.7, 2.6 and 3.0 log reductions versus vehicle control when administered at 16, 49, 99 and 166 mg/kg that provided equivalent exposures of 10, 30, 60 or 100 mg/kg compound 24. In addition, doses of 16, 49, 99 and 166 mg/kg Compound W reduced bacterial burdens versus the early control by 0.7-1.5 logs suggesting Compound 23A has bactericidal activity.

Example 33

NeutropenicRat Thigh Infection Model

Animals: Specific-pathogen-free, male Sprague Dawley rats weighing between 76 to 100 grams were obtained from Charles River Laboratories, Inc. (Wilmington, Mass.) and utilized in this experiment. Animals were allowed to acclimate for a minimum of seven (7) days before study commencement.

Bacteria: The methicillin-sensitive Staphylococcus aureus(MSSA) ATCC strain 29213 was utilized for in vivo experimentation. The test isolate was subcultured twice onto standard microbiological agar media (trypticase soy agar with 5% sheep blood). The second transfer was made less than 24 hours before use in the preparation of the thigh infection model inoculum.

Neutropenic Rat Thigh Infection Model: To induce neutropenia, rats were treated with the immunosuppressant cyclophosphamide at 150 mg/kg, administered in 1 ml by intraperitoneal (IP) injection, three day prior to infection. Rats were infected by an intramuscular (IM) 0.2 ml injection into both rear thighs with a 10⁷ cfu/ml methicillin-sensitive Staphylococcus aureus 29213 suspension in normal saline. After increasing amounts of time (2-26 hours) the two rear thighs of each animal were harvested, rinsed with sterile saline, weighed, then placed in 50 ml sterile normal saline and placed on wet ice until homogenization. Approximately one-half of the total homogenized sample volume was passed through a large pore filter (to remove cartilage and large clumped pieces of tissue), diluted in saline and cultured onto agar media plates (trypticase soy agar with 5% sheep blood). All culture plates were incubated at approximately 37° C. for 18-24 hours. Colony-forming units were enumerated (in cfu/ml of homogenate) and the median for each treatment and control group was calculated. Typically each group had an n=6; each thigh was considered a discrete number. The median cfu/mlper group was compared to the initial bacterial density at 2 hours (Early Control) or that of the time-matched vehicle control group (Late Control; LC) group harvested simultaneously.

TABLE 8 Compound 23A Demonstrates Dose-Related and Time-Dependent Reductions in S. aureus Thigh Burdens in Neutropenic Rats Treatment Time 8 Hours 24 Hours Median Log Median Log Thigh Log Reduction Thigh Log Difference Burden Difference  vs. Late Burden Difference vs. Late Treatment (Log cfu/ vs. Early Control (Log cfu/ vs. Early Control Group mL) Control (8-hour) mL) Control (24-hour) Early 5.37 5.37 Control Late Control 6.77 1.41 6.99 1.62 10 mg/kg 5.42 0.05 −1.36 4.59 −0.78 −2.40 Compound 23A 30 mg/kg 4.75 −0.62 −2.02 4.31 −1.06 −2.68 Compound 23A 60 mg/kg 4.80 −0.57 −1.97 4.19 −1.18 −2.80 Compound 23A

Neutropenic rats (3/group) were infected by intramuscular (IM) challenge with S. aureus (ATCC 29213) at ˜2×10⁶ cfu/thigh. After 2 hours a single group of rats (Early Control (EC) was euthanized and the thighs harvested, homogenized and plated to quantitate S. aureus burdens. The additional infected rats were treated by oral gavage with Vehicle at 10 ml/kg (20% Cavitron/1% HPMCAS-MG; Late Control, LC) or Compound 23A at 10, 30, 60 mg/kg. The 8-hour treatment groups received a single treatment (QD) and were euthanized and thighs collected for cfu determination 8 hours post treatment (QD), while the 24-hour treatment groups received 2 doses 12 hours apart (q12 h) and were euthanized and thighs collected 24 hours post treatment. Burdens from each individual thigh were determined and the cfu/ml and the median from the group of 3 rats was summarized.

Results: As shown above in Table 8, orally administered Compound 23A exhibited in vivo efficacy against the MSSA (SA 29213). At 8 hours after the first dose all of the groups had reductions in burdens compared to time-matched control, ˜1.3 log reduction for Compound 23A at 10 mg/kg and ˜2 log reduction for Compound 23A at 30 and 60 mg/kg. Compared to early control, Compound 23A at 10 mg/kg held the bacterial growth of SA 29213 to at least the point of stasis, whereas Compound 23A at 60 and 100 mg/kg slightly decreased the bacterial burden by ˜0.5-0.6 logs.

After 24 hours and a second dose of treatment administered at 12 hours, a decrease in bacterial density compared to late control of ˜2.4-2.8 logs was observed for all treatment groups. Compared to early control an approximately 0.8 log reduction was observed for Compound 23A at 10 mg/kg, while Compound 23A at 30 and 60 mg/kg provided ˜1.1-1.2 log reductions.

TABLE 9 Compound 13 Demonstrates Dose-Related and Time-Dependent Reductions in S. aureus Thigh Burdens in Neutropenic Rats Treatment Time 8 Hours 24 Hours Median Log Median Log Thigh Log Difference Thigh Log Difference Burden Difference vs. Late Burden Difference vs. Late Treatment (Log cfu/ vs. Early Control (Log cfu/ vs. Early Control Group mL) Control (8-hour) mL) Control (24-hour) Early Control 5.30 5.30 Late Control 6.64 1.34 7.16 1.86 10 mg/kg 5.15 −0.15 −1.49 6.02 0.72 −1.14 Compound 13 60 mg/kg 4.95 −0.35 −1.69 4.31 −0.99 −2.85 Compound 13 100 mg/kg 4.82 −0.48 −1.82 4.17 −1.13 −2.99 Compound 13

Neutropenic rats (3/group) were infected by intramuscular (IM) challenge with S. aureus (ATCC 29213) at ˜2×10⁶ cfu/thigh. After 2 hours a single group of rats (Early Control (EC)) was euthanized and the thighs harvested, homogenized and plated to quantitate S. aureus burdens. The additional infected rats were treated by oral gavage with Vehicle at 10 ml/kg (10% Vitamin E/TPGS; Late Control, LC) or Compound 13 at 30, 60, 100 mg/kg. The 8-hour treatment groups received a single treatment (QD) and were euthanized and thighs collected for cfu determination 8 hours post treatment (QD), while the 24 hour treatment groups received 2 doses 12 hours apart (q12 h) and were euthanized and thighs collected 24 hours post treatment. Burdens from each individual thigh were determined and the cfu/individual thigh and the median from the group of 3 rats was summarized for each group.

Results: As shown above in Table 9, orally administered Compound 13 exhibited in vivo efficacy against the MSSA (SA 29213). Differences in the extent of antibacterial activity were seen between the three treatment groups. At 8 hours after the first dose all of the groups had reductions in burdens compared to time-matched control, ˜1.5 log reduction for Compound 13 at 10 mg/kg and ˜1.7 and 1.8 log reduction for Compound 13 at 60 and 100 mg/kg. At 8 hours after the first dose, Compound 13 at 10 mg/kg held the bacterial growth of SA 29213 to at least the point of stasis, whereas Compound 13 at 60 and 100 mg/kg slightly decreased the bacterial burden versus early control by ˜0.4 and ˜0.5 logs respectively. After 24 hours and the second dose of treatment administered at 12 hours, a decrease in bacterial density compared to early control of approximately 1 log was exhibited by Compound 13 at 60 and 100 mg/kg. In contrast, Compound 13 administered at 30 mg/kg did not appear effective with variable cfu levels averaging 0.3 logs greater than the early control. However, all dose levels decreased bacterial density compared to late control. A reduction of ˜1.1 log was observed for the 10 mg/kg treatment group, whereas a reduction of 2.85 and ˜3 logs was observed for the 60 and 100 mg/kg dose levels.

In summary, the q12 h doses of 60 and 100 mg/kg Compound 13 diminished bacterial growth of SA 29213 as compared to the initial control group at both the 8 hours and 24 hours assessment times while treatment with 30 mg/kg limited bacterial growth at 8 hours but was less effective than other treatment groups at 24 hours.

Example 34

Seven-Day Oral (Gavage) Toxicity and Toxicokinetics Study in Rats

The objectives of this study were: 1) to evaluate the potential toxicity of Compound 13 and Compound 23A when administered orally by gavage to male rats for 7 consecutive days and 2) to assess the toxicokinetics of Compound 13, and Compound 23A after the first and seventh doses.

Animals

Species, Source, Histo and Justification

Crl:CD(SD) rats were obtained from Charles River Laboratories of Stone Ridge, N.Y. The animals were laboratory bred and experimentally naïve. Rats were chosen because they are a species that is commonly used for nonclinical toxicity evaluations.

Number, Sex, Age, and BodyWeightRange

Forty rats (20 noncannulated males and 20 males with jugular vein cannulas) were ordered. From these animals, 15 noncannulated males and 15 cannulated males were used. Animals were as uniform in age as possible. The rats were prepubertal to young adult, approximately 9 weeks of age at initiation of dosing. Their supplier-calculated birth date was retained in the study records. The weight range for the animals at the time of allocation to groups was 218.5-306.3 g.

Study Design

The rats were assigned as shown in the Table 10 below. Animals received the test article or vehicle by oral gavage for 7 consecutive days and were terminated the day following completion of dosing. The first day of dosing was designated as Day 1 of the study. The animals were evaluated for changes in clinical signs, body weight, and other parameters as described below.

TABLE 10 Group Assignment and Dose Levels No. Animals Dose Dose Dose Animals for Dose (M) No. Animals (M) Test Level Doses Concentration Volume Necropsy Group Main Study Toxicokinetics Article (mg/kg/day) per Day (mg/mL) (mL/kg) (Day 8) A 3 0 Vehicle 0 1 0 10 3 B 3 3 Compound 100 1 10 10 6 13 C 3 3 Compound 200 1 20 10 6 13 D 3 3 Compound 100 1 10 10 6 23A E 3 3 Compound 300 2 30 10 6 23A F 0 3 Vehicle 0 2 0 10 3

Route/Dose

The vehicle and test article were administered by oral gavage once daily for 7 consecutive days at a dose volume of 10 mL/kg body weight for Group A and Groups B-D, respectively. The test article and vehicle were administered by oral gavage twice daily, approximately 8 hours apart, for 7 consecutive days at a dose volume of 10 mL/kg body weight for Group E and Group F, respectively. The actual volume administered to each animal was calculated and adjusted based on the most recent body weight of each animal.

In-Life Observations and Measurements

Observations

Animals were observed for viability at least once in the morning and once in the afternoon, at least 4 hours apart, throughout the study. During the treatment period, daily cageside observations were made and recorded predose and postdose (following the first dose only). The postdosing observations made during treatment occurred at the following times based on C_(max)/T_(max) for the two compounds from previous studies:

1 hour postdose for Groups A-F.

One cageside observation was made on the day of necropsy.

Unscheduled Observations

Any findings observed at times other than scheduled observation times were to be recorded on an unscheduled observation or in Provantis; however, no abnormalities were observed throughout the study. Provantis is an electronic data collection, management and reporting system that is commonly used in the art.

Body Weights

Prior to start of dosing, body weights were measured for randomization on Day 1. During the treatment, body weights were measured on Day 1 and Day 7. In addition, fasted body weights were measured prior to necropsy for calculation of organ/body weight ratios.

Food Consumption

Throughout the study, food consumption was measured daily starting 3 days prior to start of dosing.

Clinical Pathology Evaluation

Blood samples for evaluation of hematology, coagulation, and serum chemistry parameters were collected from all animals from the retro-orbital plexus (under CO₂/O₂ anesthesia, for the main study animals) or jugular vein cannula (for the toxicokinetic animals) prior to necropsy. Due to residual heparin used to keep the cannulas patent for the toxicokinetic animals, coagulation samples from these rats, were not able to be analyzed. The animals were fasted overnight prior to blood collection. On the day of blood collection for clinical pathology analyses, the animals were not necropsied until after the blood was collected and the samples judged to be acceptable by the clinical pathology group.

Hematology

An appropriate amount of blood was collected in EDTA-containing tubes. The whole blood samples were analyzed for the parameters indicated below in Table 11.

TABLE 11 Whole Blood Parameters Red blood cells (RBC) Mean corpuscular (count and morphology) volume (MCV) White blood cells (WBC) Mean corpuscular (total and differential) hemoglobin (MCH) Hemoglobin Mean corpuscular concentration (HGB) hemoglobin concentration (MCHC) Hematocrit (HCT) Platelet count Reticulocyte count (PLAT) Mean platelet (ABSRET) volume (MPV)

Coagulation

An appropriate amount of blood was collected in tubes containing sodium citrate and then centrifuged to obtain plasma for the determination of prothrombin time (PT) and activated partial thromboplastin time (APTT).

Serum Chemistry

An appropriate amount of blood was collected in tubes without anticoagulant. The sample was allowed to clot and then was centrifuged to obtain serum. The serum was analyzed for the parameters indicated below in Table 12.

TABLE 12 Serum Parameters Sodium (NA) Calcium (CA) Potassium (K) Inorganic phosphorus (PHOS) Chloride (CL) Glucose (GLU) Total bilirubin (TBILI) Urea nitrogen (BUN) Alkaline phosphatase (ALKP) Total protein (TPRO) Lactate dehydrogenase (LDH) Albumin (ALB) Aspartate aminotransferase (AST) Globulin (GLOB) Alanine aminotransferase (ALT) Albumin/globulin ratio (A/G) Gamma-glutamyltransferase (GGT) Cholesterol (CHOL) Creatine phosphokinase (CK) Triglycerides (TRIG) Creatinine (CREA)

Toxicokinetics

On the 1^(st) and 7^(th) day a of dosing, blood samples (approximately 0.5 mL/sample) were collected from the jugular vein cannula for all toxicokinetic animals at the timepoints listed below into K₃EDTA-containing tubes. Toxicokinetic animals from the control group (Group F) only had a single blood collection sampling from each collection day at the 1-hour timepoint (following the first dose administration of the day). Prior to each collection, a small sample of blood (with heparin blocking solution) was removed from the cannula and discarded. A new syringe was placed on the cannula, and the protocol-required sample was taken. The syringe with the blood sample was removed, and a new syringe with saline attached to the cannula. Blood volume was replaced with an equal volume of saline and then blocking solution placed in the cannula. Each animal was returned to its cage until the next collection timepoint.

All samples collected during this study were placed in labeled containers. Each label contained the following information: 1) Study number, 2) Animal number, 3) collection interval, 4) Group and Sex, and 5) Date of collection.

The blood samples were mixed immediately by inverting, then placed on wet ice and centrifuged cold (˜1500 g, ˜10 minutes, ˜5° C.) to obtain plasma. The plasma was split into 96-well 1.4-mL polypropylene tubes with pierceable TPE capcluster certified RNase, DNase free caps as 2 aliquots and stored frozen (≦−70° C.).

TABLE 13 Sample Collection Timepoints Timepoint Window¹ Predose Predose 1 h ±4 min 2 h² ±5 min 4 h ±5 min 8 h³ ±5 min 12 h ±10 min  24 h ±20 min  48 h⁴ ±40 min  ¹All samples were collected within the collection window. ²Following Day 1 dosing only. ³Obtained from Groups E and F prior to PM dose administration. ⁴Following Day 7 dosing only.

Termination

No animal was deemed moribund during the study. All study animals were euthanized and subjected to a necropsy following the protocol-prescribed number of days of treatment. All animals were terminated by exsanguination (severing the abdominal aorta while under deep CO₂/O₂ anesthesia).

Necropsy

A necropsy with tissue collection was conducted on all animals terminated during the study. The necropsy included examination of:

-   carcass and muscular/skeletal system; all external surfaces and     orifices; -   cranial cavity and external surface of the brain; -   neck with associated organs and tissues; and -   thoracic, abdominal, and pelvic cavities with their associated     organs and tissues.

All abnormalities were described and recorded.

Organ Weights

For all animals euthanized at scheduled necropsies, the kidneys, liver, and prostate gland were weighed. Following weighing, an approximate 1 gram sample of liver and kidney was weighed, transferred to Precellys 7 mL CK28 Tissue Homogenizing tubes (Cat. No. 0904-01), snap-frozen, and analyzed.

Organ/body ratios were calculated using the terminal fasted body weight obtained prior to necropsy.

Tissue Preservation and Bone Marrow Collection

The tissues and organs indicated below in Table 14 were collected from all animals and were preserved in 10% neutral-buffered formalin with the exception of the testes, epididymides, and eyes. Testes, epididymides, and eyes with optic nerve attached were fixed in Modified Davidson's Solution for ˜24-48 hours, rinsed with water, and then transferred to 10% neutral-buffered formalin for storage.

TABLE 14 Tissue Collection Submitted at Organ Tissue Necropsy Weight Histopathology Animal ID X Adrenal gland (2) X Aorta X Artery, mesenteric X Bone (femur) X Bone marrow (sternum) X Brain X Epididymides (2) X Esophagus X Eyes (2) X Gross lesions X Heart X Intestine, cecum X Intestine, colon X Intestine, duodenum X Intestine, jejunum X Intestine, ileum X Intestine, rectum X Kidneys (2) X X X Liver X X X Lungs X Lymph node, mandibular X Lymph node, mesenteric X Mammary gland X Nerve, optic X Nerve, sciatic X Parathyroid gland (2)^(a) X Pancreas X Pituitary X Prostate X X X Seminal vesicles X Skeletal muscle (biceps femoris) X Skin (abdominal) X Spinal cord, cervical X Spinal cord, thoracic X Spinal cord, lumbar X Spleen X Stomach X Testes (2) X Thymus X Thyroid gland (2)^(a) X Tongue X Trachea X Urinary bladder X ^(a)Thyroid weighed with parathyroids attached.

Histopathology

For all animals scheduled for the terminal necropsy, the kidneys, liver, and prostate were embedded in paraffin, sectioned and stained with hematoxylin and eosin for further examination by light microscopy. For Groups A, D, E, and F only, the remaining tissues listed above were embedded in paraffin, sectioned and stained with hematoxylin and eosin for further examination by light microscopy.

Statistical Analysis

Where appropriate, numeric animal data were evaluated statistically.

For comparative statistics, Group A (control group) was compared to Groups B and C (treated groups, dosed QD) and Group F (control group, dosed BID) was compared to Group E (treated group, dosed BID). Data were evaluated using the Levene Test for homogeneity of variances and the Shapiro-Wilks Test for normality of distributions, with significance at p≦0.05. Data determined to be homogeneous and of normal distribution were evaluated by analysis of variance (ANOVA). If the ANOVA verified significance at p≦0.05, pairwise comparisons of each treated group with the respective control group were made using a parametric test (Dunnett Test) to identify statistical differences (p≦0.05). Data determined to be nonhomogeneous or of normormal distribution were evaluated using a Kruskal-Wallis Test for group factor significance. If significance (p≦0.05) existed between groups, a nonparametric test (Wilcoxonwith Bonferroni-Holm), was used to compare treatment groups to the control group. Food consumption data from animals where spillage occurred was excluded from the applicable time period. Comparative statistics of food consumption data were limited to the Dunnett Test (parametric). Statistics were not performed on pretest food consumption (Day 4 to Day 1).

Results

The exposures for different dosage levels of Compound 23A and Compound 13 were dose related. No adverse observations or effects on mean body weight were observed in animals treated with either Compound 13 or Compound 23A. Mean food consumption was reduced during different intervals of the study for animals treated once daily with Compound 13 (100 or 200 mg/kg) and twice daily with Compound 23A (300 mg/kg). However, as the decreased food consumption was not correlated with body weight changes in the Compound 13 and Compound 23A groups, these effects were not considered to be adverse or biologically significant. The mean calcium ion concentration (CA) was statistically lower, while the mean ALT and the AST for the group of rats administered 300 mg/kg Compound 23A twice a day were statistically higher when compared to the controls treated twice a day. No test article-related histopathological findings were noted for animals receiving either Compound 13 or Compound 23A at any dose regimen.

Within the scope of this study and based on the absence of changes in body weight, clinical pathology, and histopathology, the NOEL (No-Observable-Effect-Level) for Compound 13 administered to male rats once a day for 7 days orally via gavage was 200 mg/kg (844 μg*hr/ml Day 7 AUC), while the NOEL for Compound 23A administered once a day was 100 mg/kg (82 μg*hr/ml AUC). The NOAEL (No-Observable-Adverse-Effect-Level) for Compound 23A administered to male rats twice a day for 7 days orally via gavage was 300 mg/kg (291 μg*hr/ml AUC).

Therefore, Compounds 13 and 23A did not demonstrate adverse toxicity within the scope of the study at dose levels up to 200 mg/kg/day and 600 mg/kg/day, respectively.

Example 35

An Oral Range Finding Toxicity and Toxicokinetic Study in Male Cynomolgus Monkeys

The objectives of this study were 1) to evaluate the potential toxicity of Compound 23 when administered orally by gavage to male Cynomolgus monkeys for 7 consecutive days; and 2) to assess the toxicokinetics of Compound 23 after the first and seventh doses.

Animals

Species, Source, History, and Justification

Cynomolgus monkeys (Macaca Fascicularis) were obtained from Primus Bio-Resources Inc. of PinCourt, Quebec, Canada. Cynomolgus monkeys were chosen because they are a non-rodent species that is commonly used for nonclinical toxicity evaluations.

Number, Sex, Age, and Body Weight Range

Eight (2 naive and 6 non-naïve) males were used in the study. The animals were young adults and weighed between 2 to 4 kg at the onset of dosing.

Study Design

The animals were assigned as shown in Table 15 below. Animals received Compound 23 or vehicle by oral gavage once per day for 7 consecutive days and were terminated the day following completion of dosing. The first day of dosing was designated as Day 1 of the study. The actual volume administered to each animal was calculated and adjusted based on the most recent body weight of each animal.

TABLE 15 Group Assignment and Dose Levels Dose Dose Level Concentration Dose Volume Number of Group (mg/kg) (mg/mL) (mL/kg) animals 1 Control* 0 5 2 2  50 10 5 2 3 100 20 5 2 4 200 40 5 2 *The Control animals received the control/vehicle (20% captisol/1% HPMCAS/1% PVP in 0.01M KCl/HCL buffer) alone

In-Life Observations and Measurements

Observations

Cage-side clinical signs (ill health, behavioral changes etc.) were recorded at least once daily during the study.

Body Weights

Body weights were recorded for all animals prior to group assignment and on Days 1 (prior to dosing), 3 and 7 as well as terminally prior to necropsy (fasted).

Electrocardiography (ECG)

Electrocardiograms (bipolar limb leads I, II and III, and augmented unipolar leads aVR, aVL and aVF) were obtained for all monkeys once during the pre-treatment period and again on Day 7 (post-dosing).

The tracings were assessed for gross changes indicative of cardiac electrical dysfunction. The potential presence of abnormalities involving heart rate (lead II), sinus and atrioventricular rhythm or conductivity were determined. Heart rate, PR interval, QRS duration, QT and QTc intervals values were measured.

Toxicokinetics

A series of 7 blood samples (approximately 0.5 mL each) were collected from each monkey on Days 1 and 7 at the following time points: predose, 30 minutes and 2, 3, 6, 12 and 24 hours post-dose. For this purpose, each monkey was bled by venipuncture and the samples were collected into tubes containing the anticoagulant, K2EDTA. Tubes were placed on wet ice until ready for processing.

Clinical Pathology

Laboratory investigations (hematology, coagulation, clinical chemistry and urinalysis) were performed on all animals prior to start of treatment and prior to termination on Day 8.

Blood samples were collected by venipuncture following an overnight period of food deprivation consisting of at least 12 hours but no more than 20 hours. Urine was collected from animals deprived of food and water, overnight (at least 12 hours but no more than 20 hours).

Hematology

The following parameters were measured on blood samples collected into EDTA anticoagulant: red blood cell count, mean corpuscular hemoglobin (calculated), hematocrit (calculated), mean corpuscular volume, hemoglobin, morphology of cells, white blood cell count, platelet count, white blood cell differential (absolute), reticulocyte (absolute and percentage) and mean corpuscular hemoglobin concentration (calculated).

Coagulation

Activated partial thromboplastin time and prothrombin time were measured on blood samples collected into citrate anticoagulant.

Clinical Chemistry

The following parameters were measured on blood samples collected into tubes containing dotting activator: a/g ratio (calculated), creatinine, alanine aminotransferase, globulin (calculated), albumin, glucose, alkaline phosphatase, phosphorus (inorganic), aspartate aminotransferase, potassium, bilirubin (total), sodium, calcium, total protein, chloride, triglycerides, cholesterol (total), urea, gamma glutamyltransferase and sorbitol dehydrogenase.

Urinalysis

The following parameters were measured on urine samples: bilirubin, protein, blood, sediment microscopy, color and appearance, specific gravity, glucose, urobilinogen, ketones, volume and pH.

Termination

All animals were euthanized upon completion of the treatment period on Day 8 following an overnight period without food. The monkeys were pre-anesthetized with Ketamine and then euthanized by an intravenous overdose of sodium pentobarbital followed by exsanguination by transsection of major blood vessels.

Necropsy

A necropsy with tissue collection was conducted on all animals terminated during the study. The necropsy included examination of:

-   -   carcass and muscular/skeletal system;     -   all external surfaces and orifices;     -   cranial cavity and external surface of the brain;     -   neck with associated organs and tissues; and     -   thoracic, abdominal, and pelvic cavities with their associated         organs and tissues.         All abnormalities were described and recorded.

Tissue Preservation

On completion of the gross examination and selected organ weighing, the tissues and organs were retained as noted below in Table 16. Neutral buffered 10% formalin was used for fixation and preservation unless otherwise indicated.

TABLE 16 Tissue and Organ Retention Weigh Examine Weigh Examine ORGANS/TISSUES Retain (•) (✓) ( 

 ) ORGANS/TISSUES Retain (•) (✓) ( 

 ) Adrenals • ✓

Pituitary • ✓

Animal identification • Prostate • ✓

Aorta (thoracic) •

Rectum •

Blood Salivary Gland, mandibular •

Bone marrow smears (3) • Sciatic nerve •

Brain • ✓

Seminal vesicles •

Cecum •

Skeletal muscle •

Colon •

Skin & subcutis (thoracic) •

Epididymides •d

Duodenum •

Esophagus •

Jejunum •

Eyes •a

Ileum •

Femur & marrow •

Spinal Cord, cervical •

Gallbladder •

Spleen • ✓

Heart • ✓

Sternum & marrow •

Kidneys • ✓

Stomach •

Liver (2 lobes) • ✓

Testes •d ✓

Lungs (2 lobes) •b ✓c

Thymus • ✓

Lymph Node, mandibular •

Thyroid gland/parathyroids • ✓

Lymph Node, mesenteric •

Tongue •

Mammary gland (thoracic) •

Trachea •c

Optic nerves •a

Urinary bladder •

Pancreas •

Abnormal findings • a Davidson's fluid used for fixation and preservation b Lungs were infused with 10% neutral buffered formalin used for fixation and preservation c Lungs were weighed with trachea d Bouin's fluid used for fixation and preservation

 Examined microscopically

Histopathology

For all animals, all tissues indicated above were embedded in paraffin, sectioned and stained with hematoxylin and eosin and examined by light microscopy.

Results

The exposures for different dosage levels of Compound 23 were dose related.

There were no clinical signs, or changes in body weights, electrocardiography parameters, clinical pathology parameters, or organ weights that could be attributed to the administration of Compound 23 at doses up to 200 mg/kg/day. Similarly, there were no macroscopic or microscopic findings that could clearly be attributed to the administration of Compound 23 at doses up to 200 mg/kg/day. The no observed effect level (NOEL) for Compound 23 in male Cynomolgus monkeys was determined to be 200 mg/kg/day.

Example 36

Pharmacokinetic Studies

The pharmacokinetic parameters of selected compounds of this invention were determined in the experiments described below. General analytic procedures and specific experimental protocols were employed as follows:

General Analytic Procedures

The following general analytic procedures were employed in the pharmacokinetic experiments described below:

Sample Analysis. Concentrations of Compound 23 and Compound W in plasma were determined using a high performance liquid chromatography/tandem mass spectrometry (HPLC/MS/MS) method. Before extraction, plasma samples were diluted using blank plasma 2-, 4-, 5-, or 10-fold, as necessary, depending on the dose level or formulation. Compound 23 and Compound W along with the internal standard (1S) were extracted from (diluted) plasma, 100 μL each, by direct protein precipitation with acetonitrile (1:4 ratio of plasma/acetonitrile). After centrifugation, the supernatant extract (10 μL) was injected onto the LC/MS/MS system. The HPLC system included a Waters Xterra MS C18 column, 5 micron, 2.1 mm diameter×50 mm long eluted with a gradient mobile phase consisting of 0.1% formic acid in water or in acetonitrile.

The analytes were detected by MS/MS with Atmospheric Pressure Chemical Ionization (APCI) in the mode of multiple reaction monitoring (MRM). The lower limit of quantitation (LLOQ) was 1, 2, 4, 5, 10, or 20 ng/mL, depending on the sample dilution factor. The linear range of the assay was from 1 to 5000 ng/mL. The intra-day and inter-day assay accuracy was within 2% of the nominal values. The intra- and inter-day assay variability was <10%.

Samples of the dose suspension formulation of Compound W were assayed with an HPLC/UV method after 10-fold to 500- or 1000-fold of dilution with DMSO:acetonitrile:water (33:33:33) depending on the dose level or formulation. Samples of the dose solution formulation of Compound W were assayed with an HPLC/UV method after 10-, 50-, 100 or 500-fold of dilution with DMSO:water (50:50) depending on the dose level or formulation.

Pharmacokinetic Data Analysis. Plasma concentration-time profiles of Compound 23 and Compound W were analyzed by noncompartmental pharmacokinetic methods using WinNonlin® Professional Edition software, Version 5.1.1 (Pharsight Corporation, Mountain View, Calif.).

Key pharmacokinetic parameters including AUC_(all), AUC_(extrap), C_(max), t_(max), Cl_obs, Vss_obs and t_(1/2) were determined.

Statistical Data Analysis. Descriptive statistical data of plasma concentrations and pharmacokinetic parameter estimates were calculated, including the mean, standard deviation (SD), and coefficient of variation (% CV) using WinNonlin software, Version 5.1.1 or Microsoft Excel 2000.

Monkey Oral Study

Malecynomolgus monkeys (n=3 per dose group) were administered single nominal PO doses of 3, 30 and 300 mg/kg of Compound W by gavage. Compound W was formulated in 0.5% MC (microcrystalline cellulose). Animals had free access to food and water before and after dosing.

Blood samples (approximately 0.25 mL each) were collected via a carotid artery catheter prior to dosing and at 0 (predose), 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 48 hours post dose. Each blood sample was collected into a tube that was kept on wet ice and contained potassium EDTA as the anticoagulant. Plasma was separated and stored at approximately −70° C. until analysis.

Plasma samples were analyzed using a liquid chromatography/tandem mass spectrometry (LC/MS/MS) method to determine the concentrations of Compound 23 and Compound W with a lower limit of quantitation (LLOQ) of 1 to 20 ng/mL, depending on the sample dilution factor. Plasma concentration vs. time data was subjected to noncompartmental pharmacokinetic (PK) analysis. The results of this analysis are provided in Table 17.

TABLE 17 Pharmacokinetic Data from Monkey Oral Study Dose Cmax AUC AUCextrap Tmax t½ (mg/kg) Route Formulation Analyte (ug/ml) (ug * hr/ml) (ug * hr/ml) (hr) (hr) 30 PO 0.5% MC Compound 14.4 24.7 24.8 1.7 13.9 23 100 PO 0.5% MC Compound 20.9 76.7 76.9 2.3 8.3 23 300 PO 0.5% MC Compound 23.8 155.1 155 1.2 5.6 23 30 PO 0.5% MC Compound W 0.0264 0.0453 0.206 0.83 — 100 PO 0.5% MC Compound W 0.322 0.432 0.437 0.67 5.31 300 PO 0.5% MC Compound W 4 3.69 3.76 0.58 13.15

Monkey IV Study

Male cynomolgus monkeys (n=3 per dose group) were administered a single nominal IV bolus dose of 1 mg/kg of Compound W via a jugular vein cannula. Compound W was formulated in D5W (5% dextrose in water solution). Animals had free access to food and water before and after dosing.

Blood samples (approximately 0.25 mL each) were collected via a carotid artery catheter prior to dosing and at 0 (predose), 5 min, 10 min, 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 48 hours postdose. Each blood sample was collected into a tube that was kept on wet ice and contained potassium EDTA as the anticoagulant. Plasma was separated and stored at approximately −70° C. until analysis.

Plasma samples were analyzed using a liquid chromatography/tandem mass spectrometry (LC/MS/MS) method to determine the concentrations of Compound 23 and Compound W, with a lower limit of quantitation (LLOQ) of 1 to 20 ng/mL, depending on the sample dilution factor. Plasma concentration vs. time data were subjected to noncompartmental pharmacokinetic (PK) analysis. The results of this analysis are provided in Table 18.

TABLE 18 Pharmacokinetic Data from Monkey IV Study C0 AUC Dose (ug/ (ug * hr/ AUCextrap Cl t½ Vss (mg/kg) Route Formulation Analyte ml) ml) (ug * hr/ml) (ml/min/kg) (hr) (L/kg) 5 IV D5W Compound 10.9 3.78 3.81 23.4 6.17 2.09 23 5 IV D5W Compound W 62.4 5.79 5.83 18.2 5.35 1.88

Rat Oral Study

Groups of maleSprague Dawley rats (n=3 per dose group) were administered single nominal oral doses of 3, 10, 30, 300 mg/kg of Compound W by gavage. Compound W was formulated in either 0.5% MC (microcrystalline cellulose) or 20% Captisol, 1% HPMC-AS (hydroxypropyl methylcellulose acetyl succinate), 1% PVP (polyvinylpyrrolidone). Animals had free access to food and water before and after dosing. Blood samples (approximately 0.25 mL each) were collected via a carotid artery catheter prior to dosing and at 0 (predose), 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24 hours post dose. Each blood sample was collected into a tube that was kept on wet ice and contained potassium EDTA as the anticoagulant. Plasma was separated and stored at approximately −70° C. until analysis.

Plasma samples were analyzed using a liquid chromatography/tandem mass spectrometry (LC/MS/MS) method to determine the concentrations of Compound 23 and Compound W with a lower limit of quantitation (LLOQ) of 1 to 20 ng/mL, depending on the sample dilution factor. Plasma concentration vs. time data was subjected to noncompartmental pharmacokinetic (PK) analysis. The results of this analysis are provided in Table 19.

TABLE 19 Pharmacokinetic Data from Rat Oral Study Dose Cmax/C0 AUC AUCextrap Tmax t½ (mg/kg) Formulation Analyte (ug/ml) (ug * hr/ml) (ug * hr/ml) (hr) (hr) 3 0.5% MC Compound 0.117 0.311 0.314 0.58 4.06 23 30 0.5% MC Compound 2.9 22.5 22.6 1.7 2.6 23 100 0.5% MC Compound 6.6 77.1 77.4 2.5 2.7 23 300 0.5% MC Compound 11.7 222.8 307.6 — 17.9 23 300 20% CAPT, Compound 16.2 294.6 — 5 — 1% HPMC- 23 AS, 1% PVP 3 0.5% MC Compound W — — — — — 30 0.5% MC Compound W 0.022 0.178 0.058 3.3 3.1 100 0.5% MC Compound W 0.021 0.061 0.066 0.8 7.2 300 0.5% MC Compound W 2.33 0.324 0.464 1.2 11.3 300 20% CAPT, Compound W 0.6 2.37 4.27 1.8 — 1% HPMC- AS, 1% PVP

Rat IV Study

Groups of male Sprague Dawley rats (n=3 per dose group) were administered single nominal IV bolus doses of 1 and 5 mg/kg of Compound W via a jugular vein cannula. Compound W was formulated in D5W. Animals had free access to food and water before and after dosing. Blood samples (approximately 0.25 mL each) were collected via a carotid artery catheter prior to dosing and at 0 (predose), 5 min, 10 min, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24 hours post dose. Each blood sample was collected into a tube that was kept on wet ice and contained potassium EDTA as the anticoagulant. Plasma was separated and stored at approximately −70° C. until analysis.

Plasma samples were analyzed using a liquid chromatography/tandem mass spectrometry (LC/MS/MS) method to determine the concentrations of Compound 23 and Compound W with a lower limit of quantitation (LLOQ) of 1 to 20 ng/mL, depending on the sample dilution factor. Plasma concentration vs. time data were subjected to noncompartmental pharmacokinetic (PK) analysis. The results of this analysis are provided in Table 20.

TABLE 20 Pharmacokinetic Data from Rat IV Study AUC Dose Cmax/C0 (ur * hr/ AUCextrap t½ Cl_obs Vss_obs (mg/kg) Formulation Analyte (ug/ml) ml) (ug * hr/ml) (hr) (ml/min/kg) (L/kg) 1 D5W Compound 0.247 0.306 0.31 1.8 54.9 3.8 23 5 D5W Compound 1.2 3.04 3.06 3.6 27.3 4.08 23 1 D5W Compound W 4.8 0.416 0.419 0.9 46.7 0.38 5 D5W Compound W 9.03 1.11 1.12 7.2 84.6 5.8

Mouse Oral Study

Groups of female CD-1 mice (n=3 per dose group) were administered single nominal oral doses of 10, 30, 100 mg/kg of Compound W by gavage. Compound W was formulated in 0.5% MC. Animals had free access to food and water before and after dosing. Blood samples (approximately 0.025 mL each) were collected from the sub-mandibular vein prior to dosing and at 0 (predose), 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24 hours postdose. Each blood sample was collected into a tube that was kept on wet ice and contained potassium EDTA as the anticoagulant. Plasma was separated and stored at approximately −70° C. until analysis.

Plasma samples were analyzed using a liquid chromatography/tandem mass spectrometry (LC/MS/MS) method with a lower limit of quantitation (LLOQ) of 1 to 20 ng/mL, depending on the sample dilution factor. Plasma concentration vs. time data was subjected to noncompartmental pharmacokinetic (PK) analysis. The results of this analysis are provided in Table 21.

TABLE 21 Pharmacokinetic Data from Mouse Oral Study Dose AUC (0-t) Cmax Tmax (mg/kg) Formulation (μg*hr/mL) (μg*hr/ml) (hr) 10 0.5% MC 1.7 1.2 0.3 30 0.5% MC 4.1 2.1 0.3 100 0.5% MC 26.6 9.1 0.4

The studies described above, demonstrate that Compound W is converted in vivo into Compound 23 in at least rats, dogs and monkeys.

Example 37

Enzymology Studies

The enzyme inhibition activities of selected compounds of this invention were determined in the experiments described below:

DNA Gyrase ATPase Assay

The ATP hydrolysis activity of S. aureus DNA gyrase was measured by coupling the production of ADP through pyruvate kinase/lactate dehydrogenase to the oxidation of NADH. This method has been described previously (Tamura and Gellert, 1990, J. Biol. Chem., 265, 21342).

ATPase assays were carried out at 30° C. in buffered solutions containing 100 mM TRIS pH 7.6, 1.5 mM MgCl₂, 150 mM KCl. The coupling system contains final concentrations of 2.5 mM phosphoenol pyruvate, 200 μM nicotinamide adenine dinucleotide (NADH), 1 mM DTT, 30 ug/ml pyruvate kinase, and 10 ug/ml lactate dehydrogenase. The enzyme (90 nM final concentration) and a DMSO solution (3% final concentration) of the selected compound were added. The reaction mixture was allowed to incubate for 10 minutes at 30° C. The reaction was initiated by the addition of ATP to a final concentration of 0.9 mM, and the rate of NADH disappearance was monitored at 340 nanometers over the course of 10 minutes. The K_(i) and IC₅₀ values were determined from rate versus concentration profiles.

Selected compounds of the present invention were found to inhibit S. aureus DNA gyrase. Table 22 shows the inhibitory activity of these compounds in the S. aureus DNA gyrase inhibition assay.

TABLE 22 Inhibition of S. aureus DNA Gyrase Selected Compound K_(i) (nM) IC₅₀ (nM) Compound 23 9 Compound W <9 54

DNA Topo IV ATPase Assay

The conversion of ATP to ADP by S. aureus TopoIV enzyme was coupled to the conversion of NADH to NAD+, and the progress of the reaction was measured by the change in absorbance at 340 nm. TopoIV (64 nM) was incubated with the selected compound (3% DMSO final) in buffer for 10 minutes at 30° C. The buffer consisted of 100 mM Tris 7.5, 1.5 mM MgCl₂, 200 mM K. Glutamate, 2.5 mM phosphoenol pyruvate, 0.2 mM NADH, 1 mM DTT, 5 μg/mL linearized DNA, 50 μg/mL BSA, 30 μg/mL pyruvate kinase, and 10 μg/mL lactate dehyrodgenase (LDH). The reaction was initiated with ATP, and rates were monitored continuously for 20 minutes at 30° C. on a Molecular Devices SpectraMAX plate reader. The inhibition constant, Ki, and the IC₅₀ were determined from plots of rate vs. concentration of selected compound fit to the Morrison Equation for tight binding inhibitors.

Selected compounds of the present invention were found to inhibit S. aureus DNA Topo IV. Table 23 shows the inhibitory activity of these compounds in the S. aureus DNA gyrase inhibition assay.

TABLE 23 Inhibition of S. aureus DNA Topo IV Selected Compound K_(i) (nM) IC₅₀ (nM) Compound 23 12 Compound W 30 150

Example 38

Aqueous Solubility Study

The aqueous solubilities of compound 23 and compound W were determined according to the following procedure.

Preparation of Samples. Aqueous samples of each compound were prepared as follows. Compounds were weighed (20-30 mg compound) in 4 ml clear vials prior to adding water (0.5 mL) and stirring by magnetic stirrer. 1.0N HCl was added to the suspension to adjust the pH to the desired range. After stirring for 96 hours at room temperature, the suspension was filtered through a 0.22 micron filter (Millipore, Ultrafree centrifugal filters, Durapore PVDF 0.22 μm, Cat#UFC30GVNB). The filtrate was collected and the pH measured with a pH meter. The filtrate containing compound W was diluted 10-fold to provide an appropriate concentration for HPLC analysis. The filtrate containing compound 23 did not require dilution.

Preparation of Standard Solutions. Standard solutions of each compound were prepared according to the following procedure. 1 to 2 mg of each compound was accurately weighed into a 10 mL volumetric flask and either water (for compound W) or 1:1 methanol:0.1N HCl (for compound 23) was added to completely dissolve the compounds. Sonication was performed for compound 23 to assist with the dissolution in 1:1 methanol:0.1N HCl. When all solids dissolved, additional solvent was added to adjust the volume of each solution to 10 ml. The resulting solutions were thoroughly mixed to give the standard solutions of each compound. Each standard solution was then diluted with solvent by 2-fold, 10-fold, and 100-fold.

Solubility Analysis. Aliquots of each sample and each standard solution were analyzed by HPLC analysis (Agilent 1100, injection volume 10 μL, wavelength 271 nm, column XTerra® Phenyl 5 μm, 4.6×50 mm, Part No. 186001144, mobile phase: A: 0.1% TFA in water 0.1% TFA in AcN). Each standard solution was injected three times, and each of the samples was injected twice. Standard curves were obtained by plotting the average of the peak area from the HPLC versus the concentrations of the standard solutions (with appropriate corrections of the weights of the standards based on total water content of the solid as determined by elemental analysis). The concentration of each sample was calculated from the peak area of the aqueous sample from the HPLC results and the slope and intercept of the standard curves. The solubility values listed in Table 24 below were derived from the product of the concentration of the sample and the dilution factor of the sample.

TABLE 24 Aqueous Solubility of Compounds 23 and W Solubility Compound Solid form pH (mg/mL) Compound 23 crystalline >3.0 <0.001 Compound W crystalline 4.39 0.25

Example 39

In Vivo Metabolism Study in Hepatic and Liver S9 Cells

The conversion of Compound W to Compound 23 was studied in liver and intestinal S9 fractions from rats, dogs, monkeys and humans. Compound W was incubated at 0.1, 0.3, 1, 3, 10, 20, 40, 100, 200, 300 μM in liver S9 fractions and at 1, 3, 10, 20, 100, 300, 500, 1000 μM in intestinal S9 fractions. The incubations were done for 0, 5, 10, 15, 30, 45 or 60 minutes. The formation of Compound 23 was quantified by LC/MS-MS and data were fitted to the Michaelis Menten equation. The data in Table 25 below indicates that Compound W rapidly converts to Compound 23 in these hepatic and intestinal S9 fractions.

TABLE 25 Velocity of formation (V_(MAX)) of Compound 23 from Compound W in Liver and Intestinal S9 V_(MAX) (liver) V_(MAX) (intestine) (pmoles/min/mg) (pmoles/min/mg) Dog 19.3 1162 Monkey 25.2 1974 Rat 45.5  958 Human 45.8 ND* *ND: Parameters not determined, rate of formation did not saturate 

What is claimed is:
 1. A compound of formula

wherein R is hydrogen or fluorine; X is hydrogen, —PO(OH)₂, —PO(OH)O⁻M⁺, —PO(O⁻)₂.2M⁺, or —PO(O⁻)₂.D²⁺; M⁺ is a pharmaceutically acceptable monovalent cation; and D²⁺ is a pharmaceutically acceptable divalent cation.
 2. The compound according to claim 1 having the formula

wherein R is hydrogen or fluorine.
 3. The compound according to claim 1 having the formula

wherein X is —PO(OH)₂, —PO(OH)O⁻M⁺, —PO(O⁻)₂.D²⁺; M⁺, or —PO(O⁻)₂.D²⁺; M⁺ is a pharmaceutically acceptable monovalent cation; and D²⁺ is a pharmaceutically acceptable divalent cation.
 4. The compound according to claim 1 having the formula

wherein R is hydrogen or fluorine.
 5. The compound according to claim 4, wherein the compound is (R)-1-ethyl-3-(5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea.
 6. The compound according to claim 4, wherein the compound is (R)-1-ethyl-3-(6-fluoro-5-(2-(2-hydroxypropan-2-yl)pyrimidin-5-yl)-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-2-yl)urea.
 7. The compound according to claim 1, wherein the compound is (R)-2-(5-(2-(3-ethylureido)-6-fluoro-7-(tetrahydrofuran-2-yl)-1H-benzo[d]imidazol-5-yl)pyrimidin-2-yl)propan-2-yl dihydrogen phosphate.
 8. A pharmaceutical composition comprising a compound according to claim 1 and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
 9. A pharmaceutical composition comprising a compound according to claim 2 and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
 10. A pharmaceutical composition comprising a compound according to claim 3 and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
 11. A method of decreasing or inhibiting Mycobacterium tuberculosis, Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci bacterial quantity in a biological sample comprising contacting said biological sample with a compound according to claim
 1. 12. A method of treating a bacterial infection in a patient, wherein the bacterial infection is characterized by the presence of one or more of Mycobacterium tuberculosis, Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci, comprising administering to said patient a compound according to claim
 1. 13. The method according to claim 12, wherein the bacterial infection is selected from one or more of the following: upper respiratory infections, lower respiratory infections, ear infections, pleuropulmonary and bronchial infections, complicated urinary tract infections, uncomplicated urinary tract infections, intra-abdominal infections, cardiovascular infections, a blood stream infection, sepsis, bacteremia, CNS infections, skin and soft tissue infections, GI infections, bone and joint infections, genital infections, eye infections, or granulomatous infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), catheter infections, pharyngitis, sinusitis, otitis externa, otitis media, bronchitis, empyema, pneumonia, community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), diabetic foot infections, vancomycin resistant enterococci infections, cystitis and pyelonephritis, renal calculi, prostatitis, peritonitis, complicated intra-abdominal infections (cIAI) and other inter-abdominal infections, dialysis-associated peritonitis, visceral abscesses, endocarditis, myocarditis, pericarditis, transfusion-associated sepsis, meningitis, encephalitis, brain abscess, osteomyelitis, arthritis, genital ulcers, urethritis, vaginitis, cervicitis, gingivitis, conjunctivitis, keratitis, endophthalmitisa, an infection in cystic fibrosis patients or an infection of febrile neutropenic patients.
 14. The method according to claim 13, wherein the bacterial infection is selected from one or more of the following: community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), bacteremia, diabetic foot infections, catheter infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), vancomycin resistant enterococci infections or osteomyelitis.
 15. A pharmaceutical composition comprising a compound according to claim 5 and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
 16. A method of treating a bacterial infection in a patient, wherein the bacterial infection is characterized by the presence of one or more of Mycobacterium tuberculosis, Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci, comprising administering to said patient a compound according to claim
 5. 17. The method according to claim 16, wherein the bacterial infection is selected from one or more of the following: community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), bacteremia, diabetic foot infections, catheter infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), vancomycin resistant enterococci infections or osteomyelitis.
 18. A pharmaceutical composition comprising a compound according to claim 6 and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
 19. A method of treating a bacterial infection in a patient, wherein the bacterial infection is characterized by the presence of one or more of Mycobacterium tuberculosis, Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci, comprising administering to said patient a compound according to claim
 6. 20. The method according to claim 19, wherein the bacterial infection is selected from one or more of the following: community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), bacteremia, diabetic foot infections, catheter infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), vancomycin resistant enterococci infections or osteomyelitis.
 21. A pharmaceutical composition comprising a compound according to claim 7 and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
 22. A method of treating a bacterial infection in a patient, wherein the bacterial infection is characterized by the presence of one or more of Mycobacterium tuberculosis, Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci, comprising administering to said patient a compound according to claim
 7. 23. The method according to claim 22, wherein the bacterial infection is selected from one or more of the following: community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), bacteremia, diabetic foot infections, catheter infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), vancomycin resistant enterococci infections or osteomyelitis.
 24. A method of treating a bacterial infection in a patient, wherein the bacterial infection is characterized by the presence of one or more of Mycobacterium tuberculosis, Streptococcus pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Staphylococcus aureus, Clostridium difficile, Moraxella catarrhalis, Neisseria gonorrhoeae, Neisseria meningitidis, Mycobacterium avium complex, Mycobacterium abscessus, Mycobacterium kansasii, Mycobacterium ulcerans, Chlamydophila pneumoniae, Chlamydia trachomatis, Haemophilus influenzae, Streptococcus pyogenes or β-haemolytic streptococci, comprising administering to said patient a compound according to claim
 3. 25. The method according to claim 24, wherein the bacterial infection is selected from one or more of the following: community-acquired bacterial pneumoniae (CABP), hospital-acquired pneumonia (HAP), hospital-acquired bacterial pneumonia, ventilator-associated pneumonia (VAP), bacteremia, diabetic foot infections, catheter infections, uncomplicated skin and skin structure infections (uSSSI), complicated skin and skin structure infections (cSSSI), vancomycin resistant enterococci infections or osteomyelitis. 